EP0890653B1 - Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce - Google Patents
Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce Download PDFInfo
- Publication number
- EP0890653B1 EP0890653B1 EP98400447A EP98400447A EP0890653B1 EP 0890653 B1 EP0890653 B1 EP 0890653B1 EP 98400447 A EP98400447 A EP 98400447A EP 98400447 A EP98400447 A EP 98400447A EP 0890653 B1 EP0890653 B1 EP 0890653B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hrc
- steel
- jominy
- carburized
- carbonitrided
- 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 47
- 239000010959 steel Substances 0.000 title claims description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 229910052711 selenium Inorganic materials 0.000 claims description 5
- 239000011669 selenium Substances 0.000 claims description 5
- 229910052714 tellurium Inorganic materials 0.000 claims description 5
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 238000005256 carbonitriding Methods 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 8
- 229910052804 chromium Inorganic materials 0.000 description 7
- 238000005255 carburizing Methods 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011133 lead Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
Definitions
- the present invention relates to the manufacture of steel parts including less part of the surface is hardened by carburizing or carbonitriding, followed oil or gas quenching.
- the object of the present invention is to remedy this drawback by proposing a means for manufacturing steel parts of which at least part of the surface is hardened by carburizing or carbonitriding, especially at high temperature.
- the subject of the invention is a method for manufacturing a steel mechanical part according to which a blank for a steel part is produced and a carburizing or carbonitriding treatment is carried out, in particular at at least high temperature. part of the surface of the blank of the part.
- the chemical composition of the steel of which the part is made up comprises, by weight: 0.2% ⁇ C ⁇ 0.26% 0.05% ⁇ If ⁇ 0.5% 1% ⁇ Mn ⁇ 1.6%.
- the chemical composition of the steel is adjusted so that the JOMINY curve of the steel is such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC and so that the average values J 3m , J 11m , J 15m and J 25m of five JOMINY tests are such that:
- the JOMINY curve is such that at least one of the following conditions is satisfied: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15m ) / (8 x (J 15m - J 25m )) ⁇ 2
- the chemical composition of the steel is such that: 0.21% ⁇ C ⁇ 0.25% 0.1% ⁇ If ⁇ 0.45% 1.1% ⁇ Mn ⁇ 1.5% 0.9% ⁇ Cr ⁇ 1.4% 0.09% ⁇ Mo ⁇ 0.26% 0% ⁇ Ni ⁇ 0.6% 0.005% ⁇ Al ⁇ 0.05% 0% ⁇ Cu ⁇ 0.3% 0% ⁇ Ti ⁇ 0.05% P ⁇ 0.03%
- the nitrogen content of the steel is between 0.004% and 0.02%.
- the invention also relates to a case hardening steel whose chemical composition is that which has just been indicated; this case hardening steel having a JOMINY curve such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC the mean values J 3m , J 11m , J 15m and J 25m of five JOMINY tests being such that:
- the mean values J 7m , J 11m , J 15m and J 25m of five JOMINY tests are such that at least one of the following conditions is satisfied: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15
- the steel may also contain up to 0.02% tellurium, up to 0.04% of selenium, up to 0.07% lead, up to 0.005% calcium, to improve machinability.
- the rest of the composition is iron and impurities resulting from the development
- the chemical composition is adjusted so that the JOMINY curve of the steel is such that: 45 HRC ⁇ J 3 ⁇ 50 HRC 39 HRC ⁇ J 11 ⁇ 47 HRC 31 HRC ⁇ J 25 ⁇ 40 HRC and so that the average values J 3m , J 7m , J 11m , J 15m and J 25m of five JOMINY tests are such that:
- the JOMINY curve is a curve which characterizes the hardenability of the steel. It is obtained by measuring the hardness along a generator of a cylindrical specimen quenched by a jet of water spraying one of its ends. The hardness measured at a distance of x mm from the sprinkled end is called J x . This test is well known to those skilled in the art. However, it has the characteristic of being naturally fairly dispersed.
- the shape of the JOMINY curve is characterized, here, on the one hand by ranges of value for the points J 3 , J 11 and J 25 , and by the relation:
- ⁇ 2.5 HRC which involves the means of five different tests, carried out with the same steel. More precisely, 5 identical tests are carried out successively; for each test, we measure at least the values of J 3 , J 7 , J 11 , J 15 and J 25 , we thus obtain five values for J 3 , J 7 , J 11 , J 15 and J 25 , and we calculate for each point J x , the average J xm of the five values.
- the vertical bars are the symbol known in itself of the absolute value.
- the relation itself combined with the relation J 3m -J 15m ⁇ 9 HRC or ⁇ 8 HRC, expresses that the JOMINY curve does not show any marked inflection.
- the desired shape for the JOMINY curve can be refined by requiring that it satisfy at least one of the following relationships: 10 x (J 7m - J 11m ) / (4 x (J 15m - J 25m )) ⁇ 2.15 and: 10 x (J 7m - J 15m ) / (8 x (J 15m - J 25m )) ⁇ 2
- the copper content remains below 0.3%, the sulfur content is preferably between 0.02% and 0.1%, and it is better that it remains less than 0.09%, the aluminum content is between 0.003% and 0.06%, and it is preferable that it is between 0.005% and 0.05%.
- the steel may also contain one or more elements taken from tellurium, selenium, lead and calcium.
- a part according to the invention it is manufactured with a steel according to the invention a blank for a part which is cemented or carbonitrided to high temperature and soak in oil or gas, the oil can be cold, warm or hot.
- the workpiece blank can be produced, for example, by forging and by machining.
- parts were produced with six steels according to the invention, the chemical compositions of which were: VS mn Yes S P Or Cr MB Cu al AT 0.23 1.25 0.27 0,028 0,018 0.2 1.15 0.1 0.14 0,028 B 0.24 1.4 0.4 0.05 0.02 0.25 1.0 0.24 0.25 0.04 VS 0.21 1.35 0.15 0.07 0,025 0.35 1.25 0.18 0.2 0.01 D 0.21 1.27 0.25 0.03 0.02 0.21 1.12 0.2 0.14 0.005 E 0.23 1.27 0.27 0.031 0.014 0.197 1.1 0.214 0,137 0.016 F 0.23 1.10 0.25 0.03 0,015 0.15 1.3 0.15 0.12 0.016
- case hardening After case hardening at 995 ° C for 10 hours and quenching in warm oil at 98 ° C, the parts did not show deformations requiring machining additional. In addition, case hardening was characterized by a content of 0.94% carbon 0.1 mm below the surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9708770A FR2765890B1 (fr) | 1997-07-10 | 1997-07-10 | Procede de fabrication d'une piece mecanique en acier cementee ou carbonitruree et acier pour la fabrication de cette piece |
| FR9708770 | 1997-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0890653A1 EP0890653A1 (fr) | 1999-01-13 |
| EP0890653B1 true EP0890653B1 (fr) | 2003-08-13 |
Family
ID=9509091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98400447A Expired - Lifetime EP0890653B1 (fr) | 1997-07-10 | 1998-02-25 | Procédé de fabrication d'une pièce en acier cementée ou carbonitrurée et acier pour la fabrication de cette pièce |
Country Status (24)
| Country | Link |
|---|---|
| US (1) | US6090225A (cs) |
| EP (1) | EP0890653B1 (cs) |
| JP (1) | JP3656706B2 (cs) |
| CN (1) | CN1079446C (cs) |
| AR (1) | AR013198A1 (cs) |
| AT (1) | ATE247179T1 (cs) |
| AU (1) | AU744729B2 (cs) |
| BR (1) | BR9802358A (cs) |
| CA (1) | CA2243101C (cs) |
| CZ (1) | CZ297683B6 (cs) |
| DE (2) | DE890653T1 (cs) |
| DK (1) | DK0890653T3 (cs) |
| ES (1) | ES2126546T3 (cs) |
| FR (1) | FR2765890B1 (cs) |
| HU (1) | HUP9801540A1 (cs) |
| PL (1) | PL190892B1 (cs) |
| PT (1) | PT890653E (cs) |
| RO (1) | RO118457B1 (cs) |
| RU (1) | RU2201993C2 (cs) |
| SI (1) | SI9800193A (cs) |
| TR (1) | TR199801347A2 (cs) |
| TW (1) | TW460593B (cs) |
| UA (1) | UA58499C2 (cs) |
| ZA (1) | ZA986061B (cs) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1167561A3 (en) * | 2000-06-28 | 2009-03-04 | Mitsubishi Steel Muroran Inc. | Carburizing and carbonitriding steel |
| JP2003148294A (ja) * | 2001-11-12 | 2003-05-21 | Hitachi Ltd | 燃料ポンプ及び筒内噴射エンジン |
| DE10315416A1 (de) * | 2002-06-27 | 2004-01-22 | Ina-Schaeffler Kg | Lagefixierung eines Bolzens |
| JP2005273000A (ja) * | 2004-02-26 | 2005-10-06 | Sanyo Special Steel Co Ltd | 被削性に優れた機械構造用鋼 |
| FR2868083B1 (fr) * | 2004-03-24 | 2006-07-21 | Ascometal Sa | Acier pour pieces mecaniques, procede de fabrication de pieces mecaniques l'utilisant et pieces mecaniques ainsi realisees |
| JP5121123B2 (ja) * | 2005-03-14 | 2013-01-16 | 山陽特殊製鋼株式会社 | 耐粗粒化特性に優れた高温浸炭用鋼及びその製法並びに高温浸炭用素形品およびその浸炭焼入れ方法 |
| WO2006114453A1 (es) | 2005-04-26 | 2006-11-02 | Sidenor Investigacion Y Desarrollo, S.A. | Acero de cementación o carbonitruración y procedimiento de fabricación de piezas a partir de ese acero |
| DE102005023952B9 (de) * | 2005-05-20 | 2007-07-26 | Carl Aug. Picard Gmbh & Co. Kg | Sicherheitspanzerung zum Schutz gegen Beschuss sowie Verfahren zu ihrer Herstellung |
| US8580050B2 (en) * | 2005-08-24 | 2013-11-12 | Daido Steel Co., Ltd. | Carburized machine parts |
| RU2299263C1 (ru) * | 2006-02-10 | 2007-05-20 | Акпер Алиназар оглы Алиев | Сталь для изготовления изделий ротационным обжатием |
| RU2357066C2 (ru) * | 2007-02-12 | 2009-05-27 | Александр Георгиевич Чуйко | Насосно-компрессорная труба |
| DE102007041519A1 (de) | 2007-08-31 | 2009-03-05 | Mahle International Gmbh | Zylinderlaufbuchse und Verfahren zu ihrer Herstellung |
| FR2935988B1 (fr) * | 2008-09-12 | 2010-10-08 | Ascometal Sa | Acier, notamment pour roulements et pieces mecaniques aptes a la cementation ou a la carbonitruration, et pieces realisees avec cet acier. |
| JP5241455B2 (ja) * | 2008-12-02 | 2013-07-17 | 新日鐵住金株式会社 | 浸炭窒化部材および浸炭窒化部材の製造方法 |
| US20120018063A1 (en) * | 2009-04-06 | 2012-01-26 | Masayuki Hashimura | Case-hardened steel superiorin cold workability, machinability, and fatigue characteristics after carburized quenching and method of production of same |
| CN101892450B (zh) * | 2010-05-11 | 2012-07-04 | 青岛征和工业有限公司 | 发动机齿形链的销轴氮碳共渗处理方法 |
| FR2978969B1 (fr) | 2011-08-09 | 2013-09-13 | Ascometal Sa | Acier pour la fabrication de pieces cementees, piece cementee realisee avec cet acier et son procede de fabrication |
| DE102011054840A1 (de) * | 2011-10-26 | 2013-05-02 | Rud Ketten Rieger & Dietz Gmbh U. Co. Kg | Härtbarer Stahl für Hebe-, Anschlag-, Spann- und/oder Zurrmittel der Güteklasse 8 und darüber, Bauelement der Hebe-, Anschlag-, Spann- und/oder Zurrtechnik sowie Verfahren zur Herstellung eines solchen Bauelements |
| JP6237277B2 (ja) * | 2014-01-30 | 2017-11-29 | 大同特殊鋼株式会社 | 肌焼鋼及びこれを用いた浸炭部品 |
| JP6265048B2 (ja) * | 2014-05-26 | 2018-01-24 | 新日鐵住金株式会社 | 肌焼鋼 |
| CN107604253A (zh) * | 2017-08-30 | 2018-01-19 | 东风商用车有限公司 | 一种高淬透性Mn‑Cr系列渗碳钢 |
| RU2704049C1 (ru) * | 2018-10-03 | 2019-10-23 | Общество с ограниченной ответственностью Научно-производственное предприятие "БУРИНТЕХ" (ООО НПП "БУРИНТЕХ") | Долотная сталь |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2566000B1 (fr) * | 1984-06-13 | 1988-09-16 | Pompey Acieries | Acier de construction a haute resistance presentant une bonne usinabilite et une grande aptitude au durcissement superficiel par nitruration, utilisation de cet acier avant ou apres nitruration comme acier de construction et procede pour la fabrication de cet acier |
| JPS6191348A (ja) * | 1984-10-08 | 1986-05-09 | Kobe Steel Ltd | 高強度非調質圧延棒鋼用鋳片 |
| JPS62214157A (ja) * | 1986-03-14 | 1987-09-19 | Kobe Steel Ltd | 焼入れ性を保証した鋼材の製造方法 |
| JPS62214158A (ja) * | 1986-03-14 | 1987-09-19 | Kobe Steel Ltd | ジヨミニ−焼入れ端硬さを保証したCr鋼材の製造方法 |
| JPS63270444A (ja) * | 1986-12-16 | 1988-11-08 | Kawasaki Steel Corp | 耐サワ−性に優れたラインパイプ用鋼 |
| RU2024626C1 (ru) * | 1991-02-20 | 1994-12-15 | Евгений Семенович Мирошник | Способ определения верхней границы температурного интервала нагрева под закалку сталей, преимущественно борсодержащих |
| RU2051188C1 (ru) * | 1993-01-19 | 1995-12-27 | Череповецкий металлургический комбинат | Способ изготовления составного ролика |
| JPH0830243B2 (ja) * | 1994-05-06 | 1996-03-27 | 株式会社神戸製鋼所 | 低歪浸炭用鋼 |
| JP3094856B2 (ja) * | 1995-08-11 | 2000-10-03 | 株式会社神戸製鋼所 | 高強度高靭性肌焼き用鋼 |
-
1997
- 1997-07-10 FR FR9708770A patent/FR2765890B1/fr not_active Expired - Fee Related
-
1998
- 1998-02-25 DK DK98400447T patent/DK0890653T3/da active
- 1998-02-25 DE DE0890653T patent/DE890653T1/de active Pending
- 1998-02-25 PT PT98400447T patent/PT890653E/pt unknown
- 1998-02-25 ES ES98400447T patent/ES2126546T3/es not_active Expired - Lifetime
- 1998-02-25 EP EP98400447A patent/EP0890653B1/fr not_active Expired - Lifetime
- 1998-02-25 DE DE69817098T patent/DE69817098T2/de not_active Expired - Lifetime
- 1998-02-25 AT AT98400447T patent/ATE247179T1/de active
- 1998-06-29 TW TW087110443A patent/TW460593B/zh not_active IP Right Cessation
- 1998-06-30 AU AU73943/98A patent/AU744729B2/en not_active Ceased
- 1998-07-03 CZ CZ0213898A patent/CZ297683B6/cs not_active IP Right Cessation
- 1998-07-07 UA UA98073600A patent/UA58499C2/uk unknown
- 1998-07-08 BR BR9802358-6A patent/BR9802358A/pt not_active IP Right Cessation
- 1998-07-09 RU RU98113918/02A patent/RU2201993C2/ru not_active IP Right Cessation
- 1998-07-09 ZA ZA986061A patent/ZA986061B/xx unknown
- 1998-07-09 CA CA002243101A patent/CA2243101C/fr not_active Expired - Fee Related
- 1998-07-09 RO RO98-01160A patent/RO118457B1/ro unknown
- 1998-07-09 CN CN98117414A patent/CN1079446C/zh not_active Expired - Fee Related
- 1998-07-09 HU HU9801540A patent/HUP9801540A1/hu unknown
- 1998-07-09 US US09/112,057 patent/US6090225A/en not_active Expired - Lifetime
- 1998-07-10 PL PL327388A patent/PL190892B1/pl unknown
- 1998-07-10 JP JP19562998A patent/JP3656706B2/ja not_active Expired - Fee Related
- 1998-07-10 AR ARP980103368A patent/AR013198A1/es active IP Right Grant
- 1998-07-10 TR TR1998/01347A patent/TR199801347A2/xx unknown
- 1998-07-10 SI SI9800193A patent/SI9800193A/sl not_active IP Right Cessation
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