[go: up one dir, main page]

WO1996001408A1 - Dispositif d'ancrage sismique - Google Patents

Dispositif d'ancrage sismique Download PDF

Info

Publication number
WO1996001408A1
WO1996001408A1 PCT/NL1995/000236 NL9500236W WO9601408A1 WO 1996001408 A1 WO1996001408 A1 WO 1996001408A1 NL 9500236 W NL9500236 W NL 9500236W WO 9601408 A1 WO9601408 A1 WO 9601408A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
anchor according
arms
seismic anchor
seismic
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.)
Ceased
Application number
PCT/NL1995/000236
Other languages
English (en)
Inventor
Licio Ricardo Vitofrancesco
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.)
Eijkelkamp Agrisearch Equipment BV
Original Assignee
Eijkelkamp Agrisearch Equipment BV
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 Eijkelkamp Agrisearch Equipment BV filed Critical Eijkelkamp Agrisearch Equipment BV
Priority to AU28087/95A priority Critical patent/AU2808795A/en
Priority to DE19580767T priority patent/DE19580767T1/de
Publication of WO1996001408A1 publication Critical patent/WO1996001408A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/20—Tamping cartridges, i.e. cartridges containing tamping material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/104—Generating seismic energy using explosive charges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
    • G01V11/005—Devices for positioning logging sondes with respect to the borehole wall

Definitions

  • the invention relates to a seismic anchor, intended to prevent that explosive charges intended for seismic research, after insertion of the explosive charges into the soil, can be lifted by the detonating wires and could thus fall into the hands of unauthorized persons.
  • the seismic anchor moreover prevents that the explosive charge can be pushed upwards through natural causes.
  • a known seismic anchor is manufactured from a synthetic material and comprises a shaft, provided at the upper end with an attaching means for a suspension means, by which the anchor can be introduced into a drill pipe or seismic borehole.
  • the shaft is provided with a threaded connection means, onto which an explosive charge can be screwed.
  • the known anchor is provided with a plurality of integrally formed arms or wings. These arms have a substantially constant, thin flat cross-section from their proximal end, where they merge into the shaft, up to their distal end, so that they are sufficiently flexible to be moved by the wall of the borehall towards the shaft during insertion of the anchor, so that the insertion of the anchor and the explosive charge is not hindered too much. Moulding the anchor, for instance by injection moulding, is done such, that the arms stand out obliquely upwards and outwards, wherein the distance between the distal ends of opposite arms will be such, that it is larger than the diameter of the borehole.
  • cables are often used, in particular the detonating wires, which are attached with their lower end to the anchor, wherein, if necessary, the anchor is weighed down with weights to overcome the fric ⁇ tion of the anchor with the wall of the drill pipe or borehole.
  • a push stick is used in order to be able to move the anchor and the explosive charge con ⁇ nected with it in a controlled fashion through the borehole or the drill pipe and past narrowings or inden ⁇ tations in the passage.
  • the detonating wires are further ⁇ more veered downwards adjacent to or through the push stick, until the anchor has arrived at the desired location. Subsequently, the optional push stick is removed and the anchor will remain behind, hanging from the detonating wires.
  • the known anchor is not always able to prevent unauthorized persons from lifting the anchor by the detonating wires and thus to obtain the explosive charge and from using it for other purposes than the one originally intended.
  • Another known anchor consists of a sleeve part and an anchor part, the sleeve part being provided with means for attaching an explosive cartridge and a spring-biassed locking lever and the anchor part being provided at the lower end with means for attaching a detonator and at the upper end with biassed anchor arms hingeably provided at the outer cir ⁇ cumference.
  • the anchor part can be inserted into the sleeve part against the biassing force, upon which the locking lever ensures that mutual axial displacement is prevented and that the anchor arms are kept in a folded up position by the sleeve part gripping around it.
  • the known anchor can then be freely lowered into the drill pipe without the anchor arms being able to counter this movement by friction with the wall of the drill pipe.
  • the locking lever can fold outwards and the anchor part can move upwards somewhat under the influence of the spring force so that the anchor arms can spread out to engage the wall of the borehole.
  • the anchor arms are provided with stop cams, which, by abutting the upper edge of the sleeve part, prevent too great a swing of the anchor arms.
  • the object of the invention now is to provide a one-part seismic anchor of simple construction, which renders it practically impossible for unauthorized persons to retrieve the explosive charge.
  • a seismic anchor formed integrally of moulding material comprising a shaft, suitable to be lowered into a borehole or drill pipe by means of a suspension means, such as a push rod, wherein the shaft has an upper end and is provided at a location below it with integrally formed freely sidewards projecting, relatively rigid arms or wings, which are movable between a first position, in which they at least almost abut the shaft and a second, spread-out position, inclined relative to the shaft, so as to be able to then engage the wall of a seismic borehole, wherein the shaft is furthermore provided with means for attaching an explosive charge, and the arms are connected to the shaft by means of an in- tegrally formed flexible strip.
  • the deformation in the arm during movement between the first and the second position thereof will be restricted to an area located close to the shaft, but wherein deformation is prevented from con ⁇ centrating in a line-shaped area (perpendicular to the shaft axis) , which could thus cause that hinge portion to fail.
  • the seismic anchor according to the invention preferably comprises stopping means to prevent the arms in the second position from further outward movement or rotation. This prevents that the (rigid) arms, during the exertion of an upward pulling force on the anchor, can swing over to a position in which they point downwards and can no longer function as barbs.
  • the arms are provided with integrally formed stops.
  • the stop on the arm can therein be formed as a cam extending in proximal direction alongside the flexible strip, said cam thereby defining an interspace therewith. From a point of view of the moulding proces, it is advantageous if the flexible strip and the stop cam define a slot-like interspace tapering in distal direction.
  • the stop formed on the arm preferably merges in distal direction into a stiffening rib for the arm. This stiffens both the arm and the cam.
  • the shaft is provided with a longitudinal slit for the reception of detonating wires, which is accessible from the side, and extends from the upper end to the lower end 1, so that these wires will not hinder the movement of the arms and can moreover not become easily damaged themselves.
  • figure 1 a front view of an embodiment of the seismic anchor according to the invention
  • figure 1A a side view of the anchor of figure 1;
  • figure 2 a bottom view on the seismic anchor according to figure 1;
  • figure 2A a cross-section along IIA-IIA in figure 1;
  • figure 3 the seismic anchor of figure 1 in the position, in which it is lowered into a borehole in the field;
  • figure 4 the seismic anchor, shown in figure 3, but in this case when it has arrived at the correct height in the borehole.
  • Reference numeral 10 refers to the integrally formed seismic anchor (also called stop cap) according to the invention.
  • the seismic anchor 10 comprises a shaft 1, which is substantially hollow and is provided at its upper end 2 with a receiving space which may or may not be threaded, for the lower end of a push stick (not shown here) and which is provided at its lower end with a cylindrical cross plate 4, below which a threaded, cylindrical attaching portion 3 is present.
  • the shaft 1 tapers over a part in downward direction, with an angle ⁇ of for instance 7°.
  • the arms are provided at their distal end with rounded (see figure 2) engaging ends 6, which can engage the wall of the borehole when the anchor moves relatively upwards.
  • the arms 5 are provided at the proximal end with integral ⁇ ly formed cams 8, which are provided with an inwardly turned stop surface 9.
  • the cams 8 smoothly merge into stiffening rib 19, which gradually decreases in height in distal direction. This provides stiffnes for both the cam 8 and the arm 5.
  • a slit-like interspace tapering in distal direction is formed, wherein the taper ⁇ is 18°.
  • An advantage of the narrowing of the shaft 1 at the location of the connection of the arms 5 is that when the anchor is lowered into a drill pipe, the cams will, in the more or less folded position of the arms, remain substan ⁇ tially within the profile defined by the cross-plate 4 and will not form an obstacle which would hinder, in engagement with the wall of a drill pipe, in particular the transitions between the constituting parts thereof, the lowering of the anchor.
  • the cams are moreover rounded at their outer side to further benefit the lowering proces.
  • the cams 8 can therein be located with their outer side at a distance s of the connection of the flexible strip 7 with the shaft 1, which approximates the size t of the narrowing.
  • Figure 2 shows in the bottom view of the anchor 10 that a radially directed groove 13 extends in the shaft 1, which groove runs entirely from top to bottom. In this groove 13 the detonating wires can be placed, so that they will not be in the way and at the same time cannot become damaged themselves.
  • the seismic anchor 10 is furthermore provided with elevations 12 formed on the cross-plate 4, which elevations gradually slope in circumferential direction and run concavely downwards in radial direction.
  • elevations 12 prevent that soil, especially grains of sand, get in the interspace between cam 8 and flexible strip 7 and the shaft, where they could then render the outward swing of the arms 5 impossible.
  • the elevations can be omitted because a grain could then become stuck between the elevation and the cam.
  • the projections 12 can moreover have a function in providing a bearing for the lower side of the cams 8 in the case of a far-reaching deformation of the flexible strips 7 and similar rotation of the arms 5.
  • the cams 8 are provided with downwardly directed contact faces 18.
  • the cams 8 herein therefore have a two-fold stopping function.
  • the anchor 10 is connected with its upper end 2 to the projecting lower end 31 of a push rod 30 in a manner suitable for absorbing downward forces.
  • the cylindrical attaching portion 3 is attached via a threaded connection -to the upper portion 17 of a sleeve 14 , in which furthermore detonator 15 and explosive 16 are incorporated.
  • the anchor 10 with the explosive charge attached thereto, said explosive charge being received in the sleeve 14, is moved downward in the borehole 21 in the ground 20, by exertion of a Force F,.
  • the anchor can be lowered hanging from the detonating wires, wherein a series of swelling sleeves stacked on top of the anchor provide the requisite force that urges the anchor downward.
  • the (subaqueous) weight of the swelling sleeves is herein smaller than the failure force of the detonating wires.
  • the swelling sleeves can hereafter perform their closing-off function, can a swelling sleeve be used for the downward movement.
  • the length of the arms 5 relative to the distance from the strips 7 to the upper end 2 being chosen such, that the arms during a folding movement (figure 1, track u) remain with their ends 6 below the upper end 2 , at least below the upper edge of that upper end, which can then serve as support surface for the swelling sleeve.
  • the wall of the borehole 23 exerts a radially inward force on the engaging ends 6 of the arms 5 so that these, hinging about the flexible strips 7, are moved in a direction towards the shaft 1.
  • the push stick 30 is lifted, so that the end 31 exits the cavity 2, and is pulled out of the borehole.
  • the detonating wires 32a, 32b, (figure 4) remain behind and extend upwards from the detonator 15, through the slit 13, towards ground level.
  • the cam 8 engages with the abutting surface 9 against abutting surface 11 of the shaft 11, so that a further twisting of the arms is substantially prevented.
  • both detonating wires may have a joint maximum tensile strength of 200 Newton. This means that, in order to prevent an unauthorized person from being able to lift both the anchor and the explosive charge by pulling the detonating wires, the opposing force to be supplied by the anchor should minimally be 200 Newton. Tests have shown that this requirement can easily be met by the anchor according to the invention.
  • the anchor is made integrally by injection moulding from placic, preferably HMPE, but PP and PA are also possible, while starch plastic can also be used.
  • placic preferably HMPE
  • PP and PA are also possible, while starch plastic can also be used.
  • the distance between both engaging ends 6 is 130 mm.
  • this distance has been reduced to 70 mm, while in the position shown in figure 4, this distance has been increased to 180 mm.
  • the diameter of the cross-plate 4 is 30 mm.
  • the length -of the anchor is therein 138 mm, while the smallest and greatest thickness of the shaft at the location of the cross-sec ⁇ tion of figure 2A is 9 mm and 23 mm, respectively.
  • the lenght of the arms 5 is 100 mm (including the cam)
  • the thickness of the flexible strip 7 is 1.5 mm
  • the width 20 mm and the length is 7 mm.
  • the width of the arms is 20 mm, while the radius of the rounding of the engaging ends 6 can be 25 mm.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Acoustics & Sound (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

Dispositif d'ancrage sismique (10) en matière plastique, qui comprend un arbre (1), dont l'extrémité inférieure (3) est pourvue d'un moyen de fixation d'une charge explosive (16) avec un détonateur (15), une pluralité de bras (5) constituant un seul ensemble avec l'arbre (1), lesdits bras (5) étant accouplés à l'arbre (1) au moyen d'une bande souple (7) et comportant des cames de butée (8) servant à limiter le déplacement oscillant des bras (5) par rapport à l'arbre (1). De plus, ce dernier est pourvu d'une fente (13) servant à faire passer des câbles de détonation.
PCT/NL1995/000236 1994-07-06 1995-07-04 Dispositif d'ancrage sismique Ceased WO1996001408A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU28087/95A AU2808795A (en) 1994-07-06 1995-07-04 Seismic anchor
DE19580767T DE19580767T1 (de) 1994-07-06 1995-07-04 Seismischer Anker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9401127 1994-07-06
NL9401127A NL9401127A (nl) 1994-07-06 1994-07-06 Seismisch anker.

Publications (1)

Publication Number Publication Date
WO1996001408A1 true WO1996001408A1 (fr) 1996-01-18

Family

ID=19864413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1995/000236 Ceased WO1996001408A1 (fr) 1994-07-06 1995-07-04 Dispositif d'ancrage sismique

Country Status (4)

Country Link
AU (1) AU2808795A (fr)
DE (1) DE19580767T1 (fr)
NL (1) NL9401127A (fr)
WO (1) WO1996001408A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6419044B1 (en) 1999-04-20 2002-07-16 Schlumberger Technology Corporation Energy source for use in seismic acquisitions
US6901865B1 (en) 1999-07-09 2005-06-07 Orica Explosives Technology Pty. Ltd. Primer casing and method of charging a blasthole
WO2005071349A1 (fr) * 2004-01-26 2005-08-04 Nxco International Limited Cartouche de derochement et son utilisation
CN107941107A (zh) * 2017-12-04 2018-04-20 何洪彬 一种井下炮眼炸药填充压紧器
EP4467765A1 (fr) * 2023-05-23 2024-11-27 Welltec A/S Ensemble outil de fond à force radiale
WO2024240839A1 (fr) * 2023-05-23 2024-11-28 Welltec A/S Ensemble outil à force radiale de fond de trou

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU766127B2 (en) * 1999-07-09 2003-10-09 Orica Explosives Technology Pty Ltd Primer casing and method of charging a blasthole

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB810528A (en) * 1956-12-22 1959-03-18 Hayden Nilos Ltd Improvements in or relating to infusion equipment for shot-firing
FR1535002A (fr) * 1967-02-16 1968-08-02 Nitro Nobel Ab Charge explosive pour abatage souple
US3599567A (en) * 1968-12-26 1971-08-17 Ace Explosives Ltd Drive point for explosive charge
US4278025A (en) * 1979-02-12 1981-07-14 Mcreynolds Oliver B Seismic explosive charge loader and anchor
DE9103165U1 (de) * 1991-03-15 1991-06-13 Heuser, Wolfgang, 4722 Ennigerloh Spreizkappe als Diebstahlsicherung von Sprengstoffpatronen
DE4136096C1 (en) * 1991-11-02 1992-12-17 Edwin Deutgen Kunststofftechnik Gmbh, 3102 Hermannsburg, De Device for placing explosive charge on bottom of vertical borehole, etc. - includes casing with bottom end connected to blasting cartridge with outer dia. smaller than bore of drill pipe, etc.
EP0564773A1 (fr) * 1992-04-04 1993-10-13 DITOM KUNSTSTOFFENTWICKLUNGS- UND VERTRIEBSGESELLSCHAFT mbH Chapeau expansible utilisable comme dispositif antivol pour une cartouche explosive à installer dans des puits
US5343002A (en) * 1992-11-03 1994-08-30 Ernest J. Gremillion Disposable point with explosive charge for seismic exploration

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB810528A (en) * 1956-12-22 1959-03-18 Hayden Nilos Ltd Improvements in or relating to infusion equipment for shot-firing
FR1535002A (fr) * 1967-02-16 1968-08-02 Nitro Nobel Ab Charge explosive pour abatage souple
US3599567A (en) * 1968-12-26 1971-08-17 Ace Explosives Ltd Drive point for explosive charge
US4278025A (en) * 1979-02-12 1981-07-14 Mcreynolds Oliver B Seismic explosive charge loader and anchor
DE9103165U1 (de) * 1991-03-15 1991-06-13 Heuser, Wolfgang, 4722 Ennigerloh Spreizkappe als Diebstahlsicherung von Sprengstoffpatronen
DE4136096C1 (en) * 1991-11-02 1992-12-17 Edwin Deutgen Kunststofftechnik Gmbh, 3102 Hermannsburg, De Device for placing explosive charge on bottom of vertical borehole, etc. - includes casing with bottom end connected to blasting cartridge with outer dia. smaller than bore of drill pipe, etc.
EP0564773A1 (fr) * 1992-04-04 1993-10-13 DITOM KUNSTSTOFFENTWICKLUNGS- UND VERTRIEBSGESELLSCHAFT mbH Chapeau expansible utilisable comme dispositif antivol pour une cartouche explosive à installer dans des puits
US5343002A (en) * 1992-11-03 1994-08-30 Ernest J. Gremillion Disposable point with explosive charge for seismic exploration

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6419044B1 (en) 1999-04-20 2002-07-16 Schlumberger Technology Corporation Energy source for use in seismic acquisitions
US6901865B1 (en) 1999-07-09 2005-06-07 Orica Explosives Technology Pty. Ltd. Primer casing and method of charging a blasthole
WO2005071349A1 (fr) * 2004-01-26 2005-08-04 Nxco International Limited Cartouche de derochement et son utilisation
CN107941107A (zh) * 2017-12-04 2018-04-20 何洪彬 一种井下炮眼炸药填充压紧器
CN107941107B (zh) * 2017-12-04 2019-08-02 广西金建华民用爆破器材有限公司 一种井下炮眼炸药填充压紧器
EP4467765A1 (fr) * 2023-05-23 2024-11-27 Welltec A/S Ensemble outil de fond à force radiale
WO2024240839A1 (fr) * 2023-05-23 2024-11-28 Welltec A/S Ensemble outil à force radiale de fond de trou

Also Published As

Publication number Publication date
NL9401127A (nl) 1996-02-01
DE19580767T1 (de) 1997-05-22
AU2808795A (en) 1996-01-25

Similar Documents

Publication Publication Date Title
US4974997A (en) Hydraulic setting tool for installing anchoring and foundation support apparatus
EP3168391B1 (fr) Pôle fileté
US4843785A (en) Anchoring and foundation support apparatus and method
US6871455B1 (en) Drive/auger anchor and stabilizer
US4189879A (en) Earth anchor
US6718707B2 (en) Cable end wedge lock
WO1996001408A1 (fr) Dispositif d'ancrage sismique
AU673231B2 (en) A ground anchor
US5494378A (en) Piling apparatus
US4251963A (en) Earth anchor
EP0069181A1 (fr) Méthode et dispositif pour le renforcement d'une construction de pieux et pieu préfabriqué en béton pour l'emploi de cette méthode
EP0590367A1 (fr) Encrage pour être fixé dans le sol
US4957313A (en) Emergency suspension system for drill casings
AU2022100125A4 (en) Lifting device
WO2002095178A2 (fr) Appareil pour suspendre un conduit a l'interieur d'un tube de puits
AU2007359071A1 (en) Blast hole plugging apparatus
US3962837A (en) Apparatus for expandably engaging the walls of an earthen hole
US20050025576A1 (en) Foundation pile having a spiral ridge and method of underpinning using same
GB2089862A (en) Ground Anchors
US20060266910A1 (en) Anchoring device
GB2241525A (en) Piling
EP0281737B1 (fr) Dispositif pour recevoir des charges dans des cavernes
US4659254A (en) Marine units
WO2003010391A1 (fr) Piece d'ancrage au sol munie d'un dispositif d'ancrage et d'ouverture
WO1997014609A1 (fr) Systeme d'ancre

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ CZ DE DE DK DK EE ES FI FI GB GE HU IS JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SK TJ TM TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
RET De translation (de og part 6b)

Ref document number: 19580767

Country of ref document: DE

Date of ref document: 19970522

WWE Wipo information: entry into national phase

Ref document number: 19580767

Country of ref document: DE

122 Ep: pct application non-entry in european phase
REG Reference to national code

Ref country code: DE

Ref legal event code: 8607