US20030075251A1 - Method of handling liquid non-ferrous metals with refractory material - Google Patents
Method of handling liquid non-ferrous metals with refractory material Download PDFInfo
- Publication number
- US20030075251A1 US20030075251A1 US10/168,011 US16801102A US2003075251A1 US 20030075251 A1 US20030075251 A1 US 20030075251A1 US 16801102 A US16801102 A US 16801102A US 2003075251 A1 US2003075251 A1 US 2003075251A1
- Authority
- US
- United States
- Prior art keywords
- liquid
- aluminium
- ferrous metals
- refractory material
- liquid non
- 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.)
- Abandoned
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 8
- 239000002184 metal Substances 0.000 title claims abstract description 8
- -1 ferrous metals Chemical class 0.000 title claims abstract description 6
- 239000011819 refractory material Substances 0.000 title claims abstract description 5
- 239000004411 aluminium Substances 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011344 liquid material Substances 0.000 claims abstract description 9
- 229910009817 Ti3SiC2 Inorganic materials 0.000 claims abstract description 6
- 239000011343 solid material Substances 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims abstract description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 21
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000009694 cold isostatic pressing Methods 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910008479 TiSi2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- DFJQEGUNXWZVAH-UHFFFAOYSA-N bis($l^{2}-silanylidene)titanium Chemical compound [Si]=[Ti]=[Si] DFJQEGUNXWZVAH-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/5607—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides
- C04B35/5611—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides
- C04B35/5615—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides based on titanium silicon carbides
Definitions
- the present invention relates to a method of handling liquid non-ferrous metals, and more specifically to the solid material with which the liquid material comes into contact.
- SiC and Si3N4 are materials that have also been evaluated in contact with liquid aluminium. It was found that Si dissolved into liquid aluminium in both cases. Si3N4 was found to have the best resistance to corrosion when produced by hot isostatic pressing (HIP) of reaction-bound Si3N4 (HIPRBSN).
- HIP hot isostatic pressing
- a dense protective layer was formed from AIN.
- SiC has been found to have low corrosion resistance when the material is manufactured by using silicon metal as a binding phase. Brittleness, difficulties in mechanical working, poor resistance against thermal shocks, low impact resistance, and reactions with liquid aluminium are among the drawbacks exhibited by SiC when used with liquid aluminium.
- the present invention thus relates to a method of handling liquid non-ferrous metals, in which the liquid metal is treated as it comes into contact with a solid refractory material, said method being characterised in that the solid material is Ti 3 SiC 2 .
- this material is stable in liquid aluminium. It has been found that when in contact with liquid aluminium there is formed on the surface of the material a reaction zone which produces a layer that passivates the outer surface of said material and which prevents chemical corrosion in all essentials.
- the material Ti 3 SiC 2 has a unique combination of properties that render it suitable for high temperature applications. It has very good working properties, which enable complicated shapes to be produced. The material is also insensitive to thermal shocks. Ti 3 SiC 2 is also a material that has high impact resistance and an equilibrium temperature between brittle and tough material of about 1200° C. The thermal conductivity of the material is about 37 W/mK at room temperature.
- the material can be produced by conventional methods of producing ceramic materials, such as extrusion, cold isostatic pressing (CIPing), casting and packing by pressureless sintering, or by hot isostatic pressing (HIP). Minor fractions of TiC, SiC and TiSi 2 may be present in the finished material.
- the above mentioned treatment of the liquid material includes melting, retaining, such as when alloying, transportation, filtration, such as when degassing and purifying the material, or casting of the liquid material.
- the liquid material is magnesium or magnesium alloys instead.
- the present invention is therefore not restricted to liquid material in the form of aluminium or magnesium, but can be applied with respect to other materials in which the material Ti 3 SiC 2 is stable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Products (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Filtering Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A method of handling liquid non-ferrous metals in which the liquid metal is treated while coming into contact with a solid refractory material. The invention is characterised in that the solid material is Ti3SiC2. According to one preferred embodiment, the liquid material is aluminium or aluminium alloys.
Description
- The present invention relates to a method of handling liquid non-ferrous metals, and more specifically to the solid material with which the liquid material comes into contact.
- There is a need for refractory material that can resist the aggressive conditions that occur when the material comes into contact with liquid non-ferrous metals, such as aluminium. Among other things, this need is due to the increasing use of aluminium in vehicle parts, such as chassis and cast engine parts. Material that shall be used in direct contact with liquid aluminium must possess good corrosion properties and good erosion properties and also have a high resistance to oxidation at high temperatures and against thermal shocks, and shall also have high impact resistance and high strength and hardness. The material shall also be capable of being easily worked into complex shapes at a competitive cost.
- The aluminium industry uses at present silicon aluminium oxynitride, SIALON, despite its high manufacturing costs. One drawback with SIALON, however, is that it is brittle and therefore expensive to work.
- SiC and Si3N4 are materials that have also been evaluated in contact with liquid aluminium. It was found that Si dissolved into liquid aluminium in both cases. Si3N4 was found to have the best resistance to corrosion when produced by hot isostatic pressing (HIP) of reaction-bound Si3N4 (HIPRBSN).
- A dense protective layer was formed from AIN. SiC has been found to have low corrosion resistance when the material is manufactured by using silicon metal as a binding phase. Brittleness, difficulties in mechanical working, poor resistance against thermal shocks, low impact resistance, and reactions with liquid aluminium are among the drawbacks exhibited by SiC when used with liquid aluminium.
- Generally speaking, the high affinity of Al to Si and the high solubility of Si in Al normally results in Si dissolving in liquid aluminium.
- Some metallic materials, such as cast iron, have normally been used in conjunction with liquid aluminium, because these metals are inexpensive, have high mechanical strength and resist thermal shocks. Cast iron protective pipes, however, are wetted by liquid aluminium, resulting in dissolving of the material with subsequent contamination of the melt with undesirable iron particles.
- The aforesaid problems are solved by the present invention.
- The present invention thus relates to a method of handling liquid non-ferrous metals, in which the liquid metal is treated as it comes into contact with a solid refractory material, said method being characterised in that the solid material is Ti 3SiC2.
- It has surprisingly and unexpectedly been found that this material is stable in liquid aluminium. It has been found that when in contact with liquid aluminium there is formed on the surface of the material a reaction zone which produces a layer that passivates the outer surface of said material and which prevents chemical corrosion in all essentials.
- The material has therefore been found excellent in respect of handling liquid aluminium and aluminium alloys.
- The material Ti 3SiC2 has a unique combination of properties that render it suitable for high temperature applications. It has very good working properties, which enable complicated shapes to be produced. The material is also insensitive to thermal shocks. Ti3SiC2 is also a material that has high impact resistance and an equilibrium temperature between brittle and tough material of about 1200° C. The thermal conductivity of the material is about 37 W/mK at room temperature. The material can be produced by conventional methods of producing ceramic materials, such as extrusion, cold isostatic pressing (CIPing), casting and packing by pressureless sintering, or by hot isostatic pressing (HIP). Minor fractions of TiC, SiC and TiSi2 may be present in the finished material. The above mentioned treatment of the liquid material includes melting, retaining, such as when alloying, transportation, filtration, such as when degassing and purifying the material, or casting of the liquid material.
- Aluminium has been mentioned above. According to a preferred embodiment, the liquid material is magnesium or magnesium alloys instead.
- It is also conceivable to use successfully said material for other metals or metal alloys that have a relatively low melting point. Zinc, copper, tin and lead or their alloys are primarily intended in this respect.
- The present invention is therefore not restricted to liquid material in the form of aluminium or magnesium, but can be applied with respect to other materials in which the material Ti 3SiC2 is stable.
- It will therefore be understood that the present invention is not restricted to the aforedescribed embodiments thereof but variations can be made within the scope of the accompanying Claims.
Claims (4)
1. A method of handling liquid non-ferrous metals, in which the liquid metal is treated while coming into contact with a solid refractory material, characterised in that the solid material is Ti3SiC2.
2. A method according to claim 1 , characterised in that the liquid material is aluminium or aluminium alloys.
3. A method according to claim 1 or 2, characterised in that the liquid material is magnesium or magnesium alloys.
4. A method according to claim 1 or 2, characterised in that said treatment includes melting, retaining, transporting, filtering or casting the liquid material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/503,850 US7449045B2 (en) | 1999-12-20 | 2006-08-14 | Method of handling liquid non-ferrous metals with refractory material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9904670-8 | 1999-12-20 | ||
| SE9904670A SE515476C2 (en) | 1999-12-20 | 1999-12-20 | Process for handling liquid non-ferrous metals with refractory |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/503,850 Continuation-In-Part US7449045B2 (en) | 1999-12-20 | 2006-08-14 | Method of handling liquid non-ferrous metals with refractory material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20030075251A1 true US20030075251A1 (en) | 2003-04-24 |
Family
ID=20418206
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/168,011 Abandoned US20030075251A1 (en) | 1999-12-20 | 2000-12-18 | Method of handling liquid non-ferrous metals with refractory material |
| US11/503,850 Expired - Fee Related US7449045B2 (en) | 1999-12-20 | 2006-08-14 | Method of handling liquid non-ferrous metals with refractory material |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/503,850 Expired - Fee Related US7449045B2 (en) | 1999-12-20 | 2006-08-14 | Method of handling liquid non-ferrous metals with refractory material |
Country Status (14)
| Country | Link |
|---|---|
| US (2) | US20030075251A1 (en) |
| EP (1) | EP1242333B1 (en) |
| JP (1) | JP3818918B2 (en) |
| KR (1) | KR100679499B1 (en) |
| CN (1) | CN1241703C (en) |
| AT (1) | ATE274483T1 (en) |
| AU (1) | AU767913B2 (en) |
| BR (1) | BR0016912A (en) |
| CA (1) | CA2394025A1 (en) |
| DE (1) | DE60013322T2 (en) |
| RU (1) | RU2280018C2 (en) |
| SE (1) | SE515476C2 (en) |
| WO (1) | WO2001046082A1 (en) |
| ZA (1) | ZA200204658B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050112414A1 (en) * | 2003-10-22 | 2005-05-26 | Tamer El-Raghy | Stick resistant cooking utensils |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6662346B2 (en) * | 2017-04-19 | 2020-03-11 | Ｊｆｅスチール株式会社 | Refractory and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5882561A (en) * | 1996-11-22 | 1999-03-16 | Drexel University | Process for making a dense ceramic workpiece |
| US6312570B1 (en) * | 1998-02-09 | 2001-11-06 | Advanced Refractory Technologies, Inc. | Materials for use in electrochemical smelting of metals from ore |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2530392B2 (en) * | 1991-07-16 | 1996-09-04 | 日立造船株式会社 | Heat resistant ceramics |
| DE4437548C1 (en) * | 1994-10-20 | 1996-02-22 | Metallgesellschaft Ag | Additive contg. used titanium di:oxide catalyst |
| JP3692438B2 (en) * | 1997-08-01 | 2005-09-07 | 日本坩堝株式会社 | Non-ferrous molten metal graphite silicon carbide crucible and method for producing the same |
-
1999
- 1999-12-20 SE SE9904670A patent/SE515476C2/en not_active IP Right Cessation
-
2000
- 2000-12-18 US US10/168,011 patent/US20030075251A1/en not_active Abandoned
- 2000-12-18 AT AT00987922T patent/ATE274483T1/en not_active IP Right Cessation
- 2000-12-18 EP EP00987922A patent/EP1242333B1/en not_active Expired - Lifetime
- 2000-12-18 JP JP2001546597A patent/JP3818918B2/en not_active Expired - Fee Related
- 2000-12-18 RU RU2002119409/03A patent/RU2280018C2/en not_active IP Right Cessation
- 2000-12-18 KR KR1020027007858A patent/KR100679499B1/en not_active Expired - Lifetime
- 2000-12-18 DE DE60013322T patent/DE60013322T2/en not_active Expired - Lifetime
- 2000-12-18 BR BR0016912-9A patent/BR0016912A/en not_active Application Discontinuation
- 2000-12-18 WO PCT/SE2000/002572 patent/WO2001046082A1/en not_active Ceased
- 2000-12-18 CN CNB008172439A patent/CN1241703C/en not_active Expired - Fee Related
- 2000-12-18 AU AU24190/01A patent/AU767913B2/en not_active Ceased
- 2000-12-18 CA CA002394025A patent/CA2394025A1/en not_active Abandoned
-
2002
- 2002-06-11 ZA ZA200204658A patent/ZA200204658B/en unknown
-
2006
- 2006-08-14 US US11/503,850 patent/US7449045B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5882561A (en) * | 1996-11-22 | 1999-03-16 | Drexel University | Process for making a dense ceramic workpiece |
| US6312570B1 (en) * | 1998-02-09 | 2001-11-06 | Advanced Refractory Technologies, Inc. | Materials for use in electrochemical smelting of metals from ore |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050112414A1 (en) * | 2003-10-22 | 2005-05-26 | Tamer El-Raghy | Stick resistant cooking utensils |
| US7217907B2 (en) | 2003-10-22 | 2007-05-15 | 3-One-2 Llc | Stick resistant cooking utensils |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1411427A (en) | 2003-04-16 |
| EP1242333A1 (en) | 2002-09-25 |
| JP3818918B2 (en) | 2006-09-06 |
| JP2003518237A (en) | 2003-06-03 |
| SE515476C2 (en) | 2001-08-13 |
| US20070113706A1 (en) | 2007-05-24 |
| RU2280018C2 (en) | 2006-07-20 |
| SE9904670L (en) | 2001-06-21 |
| SE9904670D0 (en) | 1999-12-20 |
| ZA200204658B (en) | 2003-10-14 |
| DE60013322D1 (en) | 2004-09-30 |
| US7449045B2 (en) | 2008-11-11 |
| CN1241703C (en) | 2006-02-15 |
| ATE274483T1 (en) | 2004-09-15 |
| BR0016912A (en) | 2002-10-15 |
| WO2001046082A1 (en) | 2001-06-28 |
| DE60013322T2 (en) | 2005-09-15 |
| KR100679499B1 (en) | 2007-02-07 |
| CA2394025A1 (en) | 2001-06-28 |
| AU767913B2 (en) | 2003-11-27 |
| AU2419001A (en) | 2001-07-03 |
| RU2002119409A (en) | 2004-01-27 |
| KR20020086866A (en) | 2002-11-20 |
| EP1242333B1 (en) | 2004-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: DREXEL UNIVERSITY, PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUNDBERG, MATS;OLSSON, JAN-OLOF;POPILOWSKI, CHET;REEL/FRAME:013796/0134;SIGNING DATES FROM 20020608 TO 20020813 Owner name: SANDVIK AB, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUNDBERG, MATS;OLSSON, JAN-OLOF;POPILOWSKI, CHET;REEL/FRAME:013796/0134;SIGNING DATES FROM 20020608 TO 20020813 |
|
| AS | Assignment |
Owner name: SANDVIK INTELLECTUAL PROPERTY HB, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK AB;REEL/FRAME:016290/0628 Effective date: 20050516 Owner name: SANDVIK INTELLECTUAL PROPERTY HB,SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK AB;REEL/FRAME:016290/0628 Effective date: 20050516 |
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| AS | Assignment |
Owner name: SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK INTELLECTUAL PROPERTY HB;REEL/FRAME:016621/0366 Effective date: 20050630 Owner name: SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG,SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK INTELLECTUAL PROPERTY HB;REEL/FRAME:016621/0366 Effective date: 20050630 |
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| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |