CS268188B2 - Method of a and b phamotidine's pure forms winning - Google Patents
Method of a and b phamotidine's pure forms winning Download PDFInfo
- Publication number
- CS268188B2 CS268188B2 CS875799A CS579987A CS268188B2 CS 268188 B2 CS268188 B2 CS 268188B2 CS 875799 A CS875799 A CS 875799A CS 579987 A CS579987 A CS 579987A CS 268188 B2 CS268188 B2 CS 268188B2
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- famotidine
- solution
- stirring
- crystals
- data
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- XUFQPHANEAPEMJ-UHFFFAOYSA-N famotidine Chemical compound NC(N)=NC1=NC(CSCCC(N)=NS(N)(=O)=O)=CS1 XUFQPHANEAPEMJ-UHFFFAOYSA-N 0.000 claims description 42
- 229960001596 famotidine Drugs 0.000 claims description 38
- 239000013078 crystal Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 9
- 238000002425 crystallisation Methods 0.000 claims description 7
- 230000008025 crystallization Effects 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 238000004090 dissolution Methods 0.000 claims description 4
- 239000012458 free base Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 26
- 238000003756 stirring Methods 0.000 description 19
- 238000002844 melting Methods 0.000 description 18
- 230000008018 melting Effects 0.000 description 18
- 239000000203 mixture Substances 0.000 description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000000877 morphologic effect Effects 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 7
- 238000009835 boiling Methods 0.000 description 7
- 238000002329 infrared spectrum Methods 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229960000583 acetic acid Drugs 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007786 electrostatic charging Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OPXLLQIJSORQAM-UHFFFAOYSA-N mebendazole Chemical compound C=1C=C2NC(NC(=O)OC)=NC2=CC=1C(=O)C1=CC=CC=C1 OPXLLQIJSORQAM-UHFFFAOYSA-N 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WCASXYBKJHWFMY-NSCUHMNNSA-N 2-Buten-1-ol Chemical compound C\C=C\CO WCASXYBKJHWFMY-NSCUHMNNSA-N 0.000 description 1
- BPCROVNHEMFQOD-UHFFFAOYSA-N 3-[[2-(diaminomethylideneamino)-1,3-thiazol-4-yl]methylsulfanyl]-n-sulfamoylpropanamide Chemical compound NC(N)=NC1=NC(CSCCC(=O)NS(N)(=O)=O)=CS1 BPCROVNHEMFQOD-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 102000003710 Histamine H2 Receptors Human genes 0.000 description 1
- 108090000050 Histamine H2 Receptors Proteins 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000320 amidine group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WCASXYBKJHWFMY-UHFFFAOYSA-N gamma-methylallyl alcohol Natural products CC=CCO WCASXYBKJHWFMY-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229960003439 mebendazole Drugs 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002076 thermal analysis method Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D277/28—Radicals substituted by nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/38—Nitrogen atoms
- C07D277/44—Acylated amino or imino radicals
- C07D277/48—Acylated amino or imino radicals by radicals derived from carbonic acid, or sulfur or nitrogen analogues thereof, e.g. carbonylguanidines
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/38—Nitrogen atoms
- C07D277/42—Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Pharmacology & Pharmacy (AREA)
- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Thiazole And Isothizaole Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU863370A HU196775B (en) | 1986-08-05 | 1986-08-05 | Process for production of morfologically unique new modifications of famotidin and medical compositions containing such substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS579987A2 CS579987A2 (en) | 1989-04-14 |
| CS268188B2 true CS268188B2 (en) | 1990-03-14 |
Family
ID=10963778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS875799A CS268188B2 (en) | 1986-08-05 | 1987-08-04 | Method of a and b phamotidine's pure forms winning |
Country Status (18)
| Country | Link |
|---|---|
| US (3) | US4894459A (fi) |
| EP (1) | EP0256747B2 (fi) |
| JP (2) | JP2644234B2 (fi) |
| KR (1) | KR940003954B1 (fi) |
| CN (1) | CN1024275C (fi) |
| AR (1) | AR243175A1 (fi) |
| AT (1) | ATE82274T1 (fi) |
| AU (1) | AU604040B2 (fi) |
| BG (1) | BG60496B2 (fi) |
| CA (1) | CA1265809A (fi) |
| CS (1) | CS268188B2 (fi) |
| DE (2) | DE256747T1 (fi) |
| DK (1) | DK175022B1 (fi) |
| FI (1) | FI89917C (fi) |
| GR (1) | GR871216B (fi) |
| HU (1) | HU196775B (fi) |
| PH (1) | PH24069A (fi) |
| PT (1) | PT85473B (fi) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL86330A0 (en) * | 1987-06-22 | 1988-11-15 | Marga Investigacion | Famotidine polymorphic forms and their preparation |
| CA2166891C (en) * | 1993-07-09 | 2001-07-03 | Sang K. Wong | Method for making freeze dried drug dosage forms |
| US7683071B2 (en) * | 2000-07-26 | 2010-03-23 | Taro Pharmaceuticals Industries Ltd. | Composition and method for improved bioavailability and enhanced brain delivery of 5,5-diphenyl barbituric acid |
| US6756379B2 (en) | 2001-07-26 | 2004-06-29 | Taro Pharmaceutical Industries Ltd. | Non-sedating barbiturate compounds as neuroprotective agents |
| US6939873B2 (en) * | 2000-07-26 | 2005-09-06 | Taro Pharmaceuticals Industries Limited | Non-sedating barbituric acid derivatives |
| TWI353979B (en) * | 2002-04-10 | 2011-12-11 | Nippon Zoki Pharmaceutical Co | Novel crystal form of 5-hydroxy-1-methylhydantoin |
| CA2426122A1 (en) * | 2002-05-02 | 2003-11-02 | M/S Tonira Pharma Limited | A process for the preparation of a combination of famotidine polymorphis a and b |
| AR040661A1 (es) * | 2002-07-26 | 2005-04-13 | Theravance Inc | Diclorhidrato cristalino de n-{2-[-((r)-2-hidroxi-2-feniletilamino)fenil]etil}-(r)-2hidroxi-2-(3-formamido-4-hidroxifenil)etilamina, agonista del receptor adrenergico beta 2 |
| DE60324703D1 (de) | 2002-12-11 | 2008-12-24 | Taro Pharma Ind | Barbitursäure derivaten. |
| TW200510277A (en) * | 2003-05-27 | 2005-03-16 | Theravance Inc | Crystalline form of β2-adrenergic receptor agonist |
| EP1781624A4 (en) * | 2004-07-02 | 2010-06-23 | Taro Pharma Ind | PROCESS FOR THE PREPARATION OF 1-METHOXYMETHYL-5,5-DIPHENYLBARBITURIC ACID |
| US8067451B2 (en) * | 2006-07-18 | 2011-11-29 | Horizon Pharma Usa, Inc. | Methods and medicaments for administration of ibuprofen |
| US20080020040A1 (en) * | 2006-07-18 | 2008-01-24 | Horizon Therapeutics, Inc. | Unit dose form for administration of ibuprofen |
| US20070043097A1 (en) * | 2005-07-18 | 2007-02-22 | Horizon Therapeutics, Inc. | Medicaments containing famotidine and ibuprofen and administration of same |
| US20080021078A1 (en) * | 2006-07-18 | 2008-01-24 | Horizon Therapeutics, Inc. | Methods and medicaments for administration of ibuprofen |
| US8067033B2 (en) | 2007-11-30 | 2011-11-29 | Horizon Pharma Usa, Inc. | Stable compositions of famotidine and ibuprofen |
| WO2008011426A2 (en) | 2006-07-18 | 2008-01-24 | Horizon Therapeutics, Inc. | Methods and medicaments for administration of ibuprofen |
| EP2063873A2 (en) * | 2006-08-31 | 2009-06-03 | Horizon Therapeutics, Inc. | Nsaid dose unit formulations with h2-receptor antagonists and methods of use |
| US8039461B1 (en) | 2006-11-10 | 2011-10-18 | Pisgah Laboratories, Inc. | Physical states of a pharmaceutical drug substance |
| US7718649B1 (en) | 2006-11-10 | 2010-05-18 | Pisgah Labs, Inc. | Physical states of a pharmaceutical drug substance |
| WO2008066704A2 (en) * | 2006-11-14 | 2008-06-05 | Taro Pharmaceuticals North America, Inc. | Method of improving bioavailability for non-sedating barbiturates |
| US8883863B1 (en) | 2008-04-03 | 2014-11-11 | Pisgah Laboratories, Inc. | Safety of psuedoephedrine drug products |
| TW201011043A (en) | 2008-06-20 | 2010-03-16 | Chugai Pharmaceutical Co Ltd | Crystal of spiroketal derivatives and process for preparation of spiroketal derivatives |
| WO2015163832A1 (en) | 2014-04-25 | 2015-10-29 | Pharmacti̇ve İlaç Sanayi̇ Ve Ti̇caret A.Ş. | An ibuprofen and famotidine combined composition having improved stability |
| TR201618765A2 (tr) | 2016-12-16 | 2018-07-23 | Imuneks Farma Ilac Sanayi Ve Ticaret Anonim Sirketi | Ağrı ve enflamasyonun tedavisi için steroid olmayan anti-enflamatuvar ilaçlar ve H2 reseptörü antagonisti kombinasyonları. |
| JP2023534810A (ja) | 2020-07-15 | 2023-08-14 | シャバー リサーチ アソシエイツ エルエルシー | 急性痛の処置並びに胸やけの重症度及び／又はリスクの低減のための、イブプロフェン及びファモチジンから構成される単位経口用量組成物 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1543238A (en) * | 1976-09-21 | 1979-03-28 | Smith Kline French Lab | Polymorph of cimetidine |
| JPS6056143B2 (ja) * | 1979-08-02 | 1985-12-09 | 山之内製薬株式会社 | アミジン誘導体ならびにその製造法 |
| JPS5655383A (en) * | 1979-10-12 | 1981-05-15 | Yamanouchi Pharmaceut Co Ltd | Amizine derivative and its preparation |
| HU185457B (en) * | 1981-09-25 | 1985-02-28 | Richter Gedeon Vegyeszet | Process for preparating cimetidine-z |
| US4496737A (en) * | 1982-09-27 | 1985-01-29 | Merck & Co., Inc. | Process for preparing sulfamylamidine antisecretory agents |
| JPS59227870A (ja) * | 1983-06-07 | 1984-12-21 | Yamanouchi Pharmaceut Co Ltd | 新規２−グアニジノチアゾリン誘導体ならびにその製造法 |
| HU194845B (en) * | 1985-09-11 | 1988-03-28 | Richter Gedeon Vegyeszet | Process for production of n-sulphamil-3-/2-guanidintiazolil-4-methil-tio/-propion-amidin |
| DE3644246A1 (de) * | 1986-06-20 | 1987-12-23 | Uriach & Cia Sa J | Verfahren zur herstelung von 3-(((2-((aminoiminomethyl)-amino)-4-thiazolyl)-methyl)-thio)-n-(aminosulfonyl)-propanimidamid |
| GB8618847D0 (en) * | 1986-08-01 | 1986-09-10 | Smith Kline French Lab | Pharmaceutical formulations |
| IL86330A0 (en) * | 1987-06-22 | 1988-11-15 | Marga Investigacion | Famotidine polymorphic forms and their preparation |
-
1986
- 1986-08-05 HU HU863370A patent/HU196775B/hu unknown
-
1987
- 1987-07-29 GR GR871216A patent/GR871216B/el unknown
- 1987-07-30 PH PH35602A patent/PH24069A/en unknown
- 1987-08-03 DK DK198704041A patent/DK175022B1/da not_active IP Right Cessation
- 1987-08-03 FI FI873346A patent/FI89917C/fi not_active IP Right Cessation
- 1987-08-03 PT PT85473A patent/PT85473B/pt unknown
- 1987-08-04 KR KR1019870008563A patent/KR940003954B1/ko not_active IP Right Cessation
- 1987-08-04 AU AU76542/87A patent/AU604040B2/en not_active Expired
- 1987-08-04 CS CS875799A patent/CS268188B2/cs not_active IP Right Cessation
- 1987-08-04 AT AT87306882T patent/ATE82274T1/de not_active IP Right Cessation
- 1987-08-04 CN CN87105373A patent/CN1024275C/zh not_active Expired - Lifetime
- 1987-08-04 EP EP87306882A patent/EP0256747B2/en not_active Expired - Lifetime
- 1987-08-04 AR AR87308333A patent/AR243175A1/es active
- 1987-08-04 JP JP62193855A patent/JP2644234B2/ja not_active Expired - Lifetime
- 1987-08-04 CA CA000543728A patent/CA1265809A/en not_active Expired - Lifetime
- 1987-08-04 DE DE198787306882T patent/DE256747T1/de active Pending
- 1987-08-04 US US07/081,423 patent/US4894459A/en not_active Expired - Lifetime
- 1987-08-04 DE DE3782576T patent/DE3782576T3/de not_active Expired - Lifetime
-
1990
- 1990-04-27 US US07/515,191 patent/US5120850A/en not_active Expired - Lifetime
-
1991
- 1991-07-11 US US07/728,805 patent/US5128477A/en not_active Expired - Lifetime
-
1994
- 1994-01-18 BG BG98384A patent/BG60496B2/bg unknown
- 1994-08-22 JP JP6196865A patent/JP2708715B2/ja not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| IF00 | In force as of 2000-06-30 in czech republic | ||
| MK4A | Patent expired |
Effective date: 20070804 |