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EP0734964A1 - Dispositif d'emballage pour lentilles de contact - Google Patents

Dispositif d'emballage pour lentilles de contact Download PDF

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Publication number
EP0734964A1
EP0734964A1 EP96302226A EP96302226A EP0734964A1 EP 0734964 A1 EP0734964 A1 EP 0734964A1 EP 96302226 A EP96302226 A EP 96302226A EP 96302226 A EP96302226 A EP 96302226A EP 0734964 A1 EP0734964 A1 EP 0734964A1
Authority
EP
European Patent Office
Prior art keywords
flange
cover sheet
base member
cavity
packaging arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96302226A
Other languages
German (de)
English (en)
Other versions
EP0734964B1 (fr
Inventor
Jongliang Wu
Daniel Tsu-Fang Wang
Stephen Robert Beaton
Kornelis Renkema
Wybren Van Der Meulen
Victor Lust
Richard Wyatt Abrams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson and Johnson Vision Care Inc
Original Assignee
Johnson and Johnson Vision Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson and Johnson Vision Products Inc filed Critical Johnson and Johnson Vision Products Inc
Publication of EP0734964A1 publication Critical patent/EP0734964A1/fr
Application granted granted Critical
Publication of EP0734964B1 publication Critical patent/EP0734964B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/008—Packaging other articles presenting special problems packaging of contact lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/325—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil
    • B65D75/326—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil and forming one compartment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/325—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil
    • B65D75/327—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil and forming several compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/04—Articles or materials enclosed in two or more containers disposed one within another
    • B65D2577/041—Details of two or more containers disposed one within another
    • B65D2577/042—Comprising several inner containers
    • B65D2577/045—Comprising several inner containers stacked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
    • B65D2585/54—Containers, packaging elements or packages specially adapted for particular articles or materials for articles of special shape not otherwise provided for
    • B65D2585/545—Contact lenses

Definitions

  • the present invention relates to a packaging arrangement for the containment of at least one hydrophilic contact lens in a sterile aqueous solution. More specifically, the invention pertains to a packaging arrangement wherein a plurality of disposable hydrophilic contact lenses are contained in a specific number of individual packaging arrangements adapted to be collectively housed in a box-like container or carton so as to provide a specified or essentially measured supply of contact lenses for use by a consumer over a predetermined period of time.
  • the invention is directed to the aspect of providing an improved attachment between the base members of blister packages housing the contact lenses, and a flexible cover sheet utilized for sealing engagement with the base members.
  • hydrophilic contact lenses in a sterile aqueous solution
  • packaging arrangements generally consist of so-called blister packages which are employed for the storage and dispensing of the hydrophilic contact lenses by a medical practitioner or to consumer who intends to wear the contact lenses.
  • hydrophilic contact lenses which may be disposable after a single wear or short-term use, are manufactured from suitable hydrophilic polymeric materials. These materials may be, amongst others, copolymers of hydroxyethyl methacrylate containing from about 20% to 90% or more of water, depending upon the polymer composition.
  • such contact lenses must be stored in a sterile aqueous solution, usually in isotonic saline solution in order to prevent dehydration and to maintain the lenses in a ready-to-wear condition.
  • contact lens manufacturers normally utilized stoppered glass bottles containing sterile saline solutions in which the hydrophilic contact lenses were immersed as storage and shipping containers for individual contact lenses.
  • Each bottle was sealed with a suitable silicone stopper and provided with a metal closure as a safety seal in the configuration of an overcap.
  • the metal closure safety seal was required to be initially torn off the bottle, thereafter the stopper withdrawn and the lens lifted out from the bottle through the intermediary of a suitable plastic tweezer or pouring the contents out.
  • This entailed the implementation of an extremely complicated procedure, since the contact lens was difficulty to grasp and remove from the saline solution contained in the bottle due to the transparent nature of the contact lens which rendered it practically invisible to the human eye.
  • containments in the form of blister packages have been developed for hydrophilic contact lenses, and which enable the storage and shipping of the hydrophilic contact lenses in a simple and inexpensive expedient manner, while concurrently facilitating the conveniently easy removal of the contact lens by a practitioner or a patient.
  • a blister package which is adapted to provide a sterile sealed storage environment for a disposable or single-use hydrophilic contact lens, wherein the lens is immersed in a sterile aqueous solution; for example, such as in an isotonic saline solution, is described in U.S. Patent No. 4,691,820 to Martinez; which is assigned to the common assignee of the present application, and the disclosure of which is incorporated herein by reference.
  • the blister package for storing and dispensing a hydrophilic contact lens includes an injection-molded or thermoformed plastic base portion incorporating a molded cavity which is surrounded by an outstanding planar flange about the rim of the cavity.
  • a flexible cover sheet is adhered to the surface of the flange so as to sealingly enclose the cavity in a generally liquid-tight mode.
  • a hydrophilic contact lens is immersed in a sterile aqueous solution, such as an isotonic saline solution.
  • a portion of the side wall of the cavity is inclined to form a ramp extending upwardly towards the flange from the bottom of the cavity, and the cover sheet is adapted to be stripped from the flange in order to expose the cavity and inclined side wall thereof whereupon the lens may be readily manually removed by being slid upwardly and out of the cavity along the inclined ramp surface of the cavity.
  • blister packages have the lens-containing cavity shaped to be of an essentially semi-spherical configuration which is dimensioned so as to be adapted to closely support the contact lens therein immersed in an aqueous solution for ease of removal and also to facilitate an inspection process, as disclosed in copending European patent applications Nos. and (claiming priority from USSNs 08/414513 and 08/414515 respectively) (Attorney references P15440EP and P15441EP respectively).
  • the foregoing construction primarily considers the utilization of such blister packages for the dispensing of individual contact lenses, with such blister packages being ordinarily separate or single packagings, which may then be housed in larger quantities in a further container, such as a rigid cardboard or paperboard carton of usual construction employed for the retail sales of the lenses.
  • packaging arrangements including specified quantities of such hydrophilic contact lenses contained in blister packages, such as being in suitable interconnected arrays, wherein these packaging arrangements are adapted to be boxed in a carton enabling a rapid and precise determination as to the quantity of hydrophilic contact lenses contained therein, and with such packaging arrangements being of a compact nature which is completely protective of the hydrophilic lenses.
  • the inventive concept pertains to packaging arrangements in which a plurality of blister packages each has a cavity containing respectively one hydrophilic contact lens in a sterile aqueous solution.
  • a specified quantity of such blister packages has the molded plastic base members thereof each containing a contact lens positioned in a contiguous array, and is initially covered by a single flexible cover sheet constituted of a laminated foil or other materials, such as metallized PET, PC to enhance barrier properties, or a layer of the laminate structure including silicon oxide on a plastic laminate to provide barrier properties in order to provide a sealed environment for each of the contact lenses contained in the cavity formed in each base member.
  • the flexible cover sheet may be dimensioned to cover a single base member to provide an individual or single packaging arrangement, or, in an alternative concept, may be in the form of strips whereby adjoining base members are severable interconnected to enable the dispensing of individual blister packages each containing one of the hydrophilic contact lenses as may be required by a user.
  • Each of the blister package base members which may possess a substantially rectangular outstanding planar flange encompassing a respective contact lens receiving cavity formed therein, the latter of which may be offset towards one end of the flange, and may incorporate integral support structure formulating rigidly supported and compact packaging arrangements such that the cavities containing the hydrophilic contact lenses of superimposed arrays are substantially protected against potentially damaging external influences, such as shocks or impacts which may be imparted thereto during handling thereof.
  • Each molded plastic base member of a blister package may be constituted from a suitable injection molded or thermoformed thermoplastic sheet material, such as, for instance, polypropylene, PET, PC and other thermoplastic materials; whereas the flexible cover sheet may be constituted of a laminate or other type of barrier material, as mentioned hereinabove, suitably imprinted and which is adapted to be heat-sealed to the flange extending about the cavity of the package containing the hydrophilic contact lens.
  • the flexible cover sheet may be of a material composition and imprinted in a novel manner as is disclosed in EP-A-0 646 471.
  • the individual base members are positioned on a production line so as not to be in direct contact with each other or only in a closely spaced relationship, whereby the superposition thereon of the flexible cover sheet is implemented through apparatus which does not always accurately position the cover sheet over the collective sequentially spaced blister package base members.
  • the surfaces of the flexible cover sheets facing the individual base members may provide adequate sealing adherence about the periphery or confines of the cavities containing the contact lenses, it may be necessary to provide engagement with at least peripheral surface portions of the flanges extending in spaced relationship about the cavities to form essentially closed and peripherally sealed blister packages without the need for the provision of adhesive materials.
  • each of the base members as described hereinbelow may have the peripheral edges of the flange surface provided with a continuously extending groove or recess extending proximate the periphery thereof, so as to enable a pressure die having a configuration complementary to the shape of the groove to force the superimposed flexible cover sheet into sealing engagement with the peripheral groove.
  • the cover sheet may be trimmed and severed to form individual blister packages while permitting the material of the flexible cover sheet which is engaged in the flange groove to form a sealing adherence with the groove wall structure.
  • a corner of the package may be reduced in size in order to more easily enable grasping of the lid or cover sheet so as to start the removal thereof from the package. This will enable the formation of the individual blister packages, each containing respectively one of the hydrophilic contact lenses without the need of having to precisely position the continuous flexible cover sheet over the sequence of blister packages being produced.
  • the groove additionally serves to prevent the foil or material of the cover sheet from extending beyond the edges of the blister package or base member which, conceivably, could cause jams to occur in downstream processing equipment during production.
  • An embossing die which tucks the cover sheet material into the peripheral groove on the base member is chamfered at one corner so as not to tuck the material into the groove as far at that location. This serves as the point at which the user may grasp the flexible cover sheet and detach and remove it from the base member.
  • a tip of embossing die is designed to "iron out" wrinkles that form naturally during the actual pressing of the foil. In other words, simply tucking foil will cause wrinkling, but this die deforms (draws) the material during insertion so that no wrinkles appear.
  • a more specific object of the present invention is to provide blister packages for the containment of hydrophilic contact lenses, wherein a planar flange structure of a base member of the package has a peripheral groove formed therein and extending along the edges thereof, into which groove there may be sealingly engaged the material of a flexible cover sheet to provide an attachment of the cover sheet to the base member, while preventing the material from extending beyond the edges of the base member through imparting a reduced size to a corner of the package to mate with a particular section of the embossing die.
  • Yet another object of the present invention is to provide a method of attaching a flexible cover sheet to a flange portion of a base member for a blister package through effectuating a mechanical sealing engagement between the material of the flexible cover sheet and a groove structure formed in the flange.
  • a base member 10 as shown in Figure 1, which has a planar flange 12 of generally rectangular configuration in plan view, and which possess rounded end corners 14, although if desired it is also possible to produce the flange 12 with sharp end corners.
  • a cavity 16 Offset towards one end of the flange 12 is a cavity 16 which, in this instance, is of generally semicircular configuration and which is adapted to receive therein a hydrophilic contact lens which is immersed in a sterile saline solution, as is well known in the technology.
  • an indentation or depression 18 Molded into the planar flange 12 proximate the cavity 16 is an indentation or depression 18, which may be of a generally frusto-conical planar configuration, which is coextensive and spaced from the perimeter of the cavity 16, and wherein the depression 18 is formed primarily for the purpose of reinforcing the planar flange 12 and to strengthen the latter against lateral deflection tending to break the seal about the cavity 16 formed with a cover sheet. Imparting pressure against the flexible cover material in this region may also assist in detaching the former from its engagement with the base member.
  • a continuous peripheral groove 24 Formed along the periphery of the rectangular flange 12 and slightly offset inwardly of the edge thereof is a continuous peripheral groove 24 which imparts a stiffening strengthening to the structure of the flange, with an increased radius at one or two corners 14a to allow the user to attain an easier grip on the lid or flexible cover sheet.
  • the peripheral groove 24 is adapted to be covered, as is the remaining flange surface, by a flexible cover sheet of the type as described hereinabove, and whereby the surface of the flexible cover sheet extending about the cavity 16 containing the contact lens is adhesively fastened thereto.
  • a suitable pressure die 30 having a protrusion 32 coextensive with the perimeter of the groove in the flange 12 is forced downwardly into engagement with the surface of the flexible cover sheet so as to force the material thereof into the groove extending along the perimeter of the flange of the blister package base member.
  • the width and depth of the groove is dimensioned to cause a clamping engagement to take place with the flexible cover sheet material which is forced therein by the die 30, so as to essentially provide a mechanical sealing engagement between the cover sheet and the flange 12 of the blister package base member within the confines of the peripheral groove.
  • such material may be severed or suitable weakening lines formed therein in order to form a continuous array or strip of a predetermined number of detachably interconnected blister packages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Packages (AREA)
  • Packaging Frangible Articles (AREA)
  • Eyeglasses (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
EP96302226A 1995-03-31 1996-03-29 Dispositif d'emballage pour lentilles de contact Expired - Lifetime EP0734964B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41451495A 1995-03-31 1995-03-31
US414514 1995-03-31

Publications (2)

Publication Number Publication Date
EP0734964A1 true EP0734964A1 (fr) 1996-10-02
EP0734964B1 EP0734964B1 (fr) 2001-12-05

Family

ID=23641782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96302226A Expired - Lifetime EP0734964B1 (fr) 1995-03-31 1996-03-29 Dispositif d'emballage pour lentilles de contact

Country Status (8)

Country Link
EP (1) EP0734964B1 (fr)
JP (1) JP4030609B2 (fr)
AT (1) ATE210056T1 (fr)
AU (1) AU704826B2 (fr)
CA (1) CA2173099C (fr)
DE (1) DE69617505T2 (fr)
SG (1) SG52616A1 (fr)
TW (1) TW377331B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0765815A3 (fr) * 1995-09-29 1997-06-04 Johnson & Johnson Vision Prod Dispositif d'emballage pour lentilles de contact
EP1631509A4 (fr) * 2003-05-20 2008-04-09 Smithkline Beecham Corp Plaquettes alveolaires de securite pour enfants utilisant des structures a parois renfermant un medicament
WO2016061600A1 (fr) * 2014-10-21 2016-04-28 Forstner Bernhard Bande alvéolaire
GB2619575A (en) * 2022-12-12 2023-12-13 Coopervision Int Ltd A packaged contact lens

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6531432B2 (en) * 2000-12-07 2003-03-11 Johnson & Johnson Vision Care, Inc. Contact lens packaging solutions
JP4749614B2 (ja) * 2001-07-17 2011-08-17 株式会社メニコン 眼用レンズ容器
NZ577307A (en) * 2009-05-29 2010-09-30 Frederick Michael Coory Improvements in encapsulation
WO2013098870A1 (fr) * 2011-12-26 2013-07-04 株式会社メニコン Récipient d'emballage de lentilles de contact, corps de récipient utilisé dans celui-ci, et procédé pour empiler des récipients d'emballage de lentilles de contact
US11782297B2 (en) 2020-08-28 2023-10-10 Coopervision International Limited Dimpled contact lens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1815790A1 (de) * 1967-12-20 1970-03-05 Jintan Terumo Co Behaelter fuer sterilisierte Gegenstaende
US4691820A (en) * 1985-11-18 1987-09-08 Vistakon, Inc. Package for hydrophilic contact lens
GB2216864A (en) * 1988-03-16 1989-10-18 Plastona Sealing an array of containers
EP0604177A2 (fr) * 1992-12-21 1994-06-29 JOHNSON & JOHNSON VISION PRODUCTS, INC. Emballage pour lentille ophthalmique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5697495A (en) * 1993-11-02 1997-12-16 Johnson & Johnson Vision Products, Inc. Packaging arrangement for contact lenses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1815790A1 (de) * 1967-12-20 1970-03-05 Jintan Terumo Co Behaelter fuer sterilisierte Gegenstaende
US4691820A (en) * 1985-11-18 1987-09-08 Vistakon, Inc. Package for hydrophilic contact lens
GB2216864A (en) * 1988-03-16 1989-10-18 Plastona Sealing an array of containers
EP0604177A2 (fr) * 1992-12-21 1994-06-29 JOHNSON & JOHNSON VISION PRODUCTS, INC. Emballage pour lentille ophthalmique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0765815A3 (fr) * 1995-09-29 1997-06-04 Johnson & Johnson Vision Prod Dispositif d'emballage pour lentilles de contact
EP1631509A4 (fr) * 2003-05-20 2008-04-09 Smithkline Beecham Corp Plaquettes alveolaires de securite pour enfants utilisant des structures a parois renfermant un medicament
WO2016061600A1 (fr) * 2014-10-21 2016-04-28 Forstner Bernhard Bande alvéolaire
US10390753B2 (en) 2014-10-21 2019-08-27 Alltest Gmbh Blister strip
EA034295B1 (ru) * 2014-10-21 2020-01-27 Аллтест Гмбх Блистерная полоска
US11497434B2 (en) 2014-10-21 2022-11-15 Alltest Gmbh Blister strip
GB2619575A (en) * 2022-12-12 2023-12-13 Coopervision Int Ltd A packaged contact lens
GB2619575B (en) * 2022-12-12 2024-09-04 Coopervision Int Ltd A packaged contact lens

Also Published As

Publication number Publication date
AU704826B2 (en) 1999-05-06
JPH0947312A (ja) 1997-02-18
ATE210056T1 (de) 2001-12-15
CA2173099A1 (fr) 1996-10-01
AU5039196A (en) 1996-10-10
DE69617505T2 (de) 2002-07-18
EP0734964B1 (fr) 2001-12-05
SG52616A1 (en) 1998-09-28
CA2173099C (fr) 2006-09-12
TW377331B (en) 1999-12-21
DE69617505D1 (de) 2002-01-17
JP4030609B2 (ja) 2008-01-09

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