SK284109B6 - Spôsob prípravy 1-[9'H-karbazol-4'-yloxy]-3-[{2''-(2'''-<metoxy>- fenoxy)-etyl}-amino]-2-propanolu (karvedilolu) - Google Patents
Spôsob prípravy 1-[9'H-karbazol-4'-yloxy]-3-[{2''-(2'''-<metoxy>- fenoxy)-etyl}-amino]-2-propanolu (karvedilolu) Download PDFInfo
- Publication number
- SK284109B6 SK284109B6 SK1560-98A SK156098A SK284109B6 SK 284109 B6 SK284109 B6 SK 284109B6 SK 156098 A SK156098 A SK 156098A SK 284109 B6 SK284109 B6 SK 284109B6
- Authority
- SK
- Slovakia
- Prior art keywords
- methoxy
- ethyl
- phenoxy
- yloxy
- carbazol
- Prior art date
Links
- 229960004195 carvedilol Drugs 0.000 title claims abstract description 21
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 title claims abstract description 21
- NPAKNKYSJIDKMW-UHFFFAOYSA-N carvedilol Chemical compound COC1=CC=CC=C1OCCNCC(O)COC1=CC=CC2=NC3=CC=C[CH]C3=C12 NPAKNKYSJIDKMW-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N 2-propanol Substances CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 80
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 29
- SVWKIGRDISDRLO-UHFFFAOYSA-N 4-(oxiran-2-ylmethoxy)-9h-carbazole Chemical compound C=1C=CC=2NC3=CC=CC=C3C=2C=1OCC1CO1 SVWKIGRDISDRLO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012458 free base Substances 0.000 claims abstract description 6
- 238000009903 catalytic hydrogenation reaction Methods 0.000 claims abstract description 5
- 238000006264 debenzylation reaction Methods 0.000 claims abstract description 5
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 3
- 150000007524 organic acids Chemical class 0.000 claims abstract description 3
- 235000005985 organic acids Nutrition 0.000 claims abstract description 3
- 239000011541 reaction mixture Substances 0.000 claims description 16
- 229960004592 isopropanol Drugs 0.000 abstract description 60
- 150000003335 secondary amines Chemical class 0.000 abstract description 10
- 239000000654 additive Chemical class 0.000 abstract 4
- 230000000996 additive effect Effects 0.000 abstract 4
- 150000007513 acids Chemical class 0.000 abstract 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 abstract 1
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 57
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 30
- 239000013078 crystal Substances 0.000 description 29
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 22
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000003054 catalyst Substances 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 13
- 230000008020 evaporation Effects 0.000 description 13
- 239000000047 product Substances 0.000 description 12
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- 238000003756 stirring Methods 0.000 description 10
- 238000009835 boiling Methods 0.000 description 9
- 239000000706 filtrate Substances 0.000 description 8
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000012043 crude product Substances 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 5
- YMWUJEATGCHHMB-UHFFFAOYSA-N dichloromethane Substances ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 5
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 5
- 229910052763 palladium Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- -1 2- [2 '- (methoxy) -phenoxy] -ethyl halide Chemical class 0.000 description 4
- CKJRKLKVCHMWLV-UHFFFAOYSA-N 2-(2-methoxyphenoxy)ethanamine Chemical compound COC1=CC=CC=C1OCCN CKJRKLKVCHMWLV-UHFFFAOYSA-N 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004587 chromatography analysis Methods 0.000 description 4
- 239000005457 ice water Substances 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 150000004681 metal hydrides Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- PBRPKYRJVDJZTF-UHFFFAOYSA-N 1-(2-bromoethoxy)-2-methoxybenzene Chemical compound COC1=CC=CC=C1OCCBr PBRPKYRJVDJZTF-UHFFFAOYSA-N 0.000 description 1
- UUUATVREIARQHR-UHFFFAOYSA-N 1-amino-3-(9h-carbazol-4-yloxy)propan-2-ol Chemical compound N1C2=CC=CC=C2C2=C1C=CC=C2OCC(O)CN UUUATVREIARQHR-UHFFFAOYSA-N 0.000 description 1
- IFXQVNUAEAGXOV-UHFFFAOYSA-N 2-(2-methoxyphenoxy)acetaldehyde Chemical compound COC1=CC=CC=C1OCC=O IFXQVNUAEAGXOV-UHFFFAOYSA-N 0.000 description 1
- VWVRTVRGLRSWEQ-UHFFFAOYSA-N 2-(2-methoxyphenoxy)acetyl chloride Chemical compound COC1=CC=CC=C1OCC(Cl)=O VWVRTVRGLRSWEQ-UHFFFAOYSA-N 0.000 description 1
- SVWKIGRDISDRLO-SNVBAGLBSA-N 4-[[(2r)-oxiran-2-yl]methoxy]-9h-carbazole Chemical compound C=1C=CC=2NC3=CC=CC=C3C=2C=1OC[C@H]1CO1 SVWKIGRDISDRLO-SNVBAGLBSA-N 0.000 description 1
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 102000012740 beta Adrenergic Receptors Human genes 0.000 description 1
- 108010079452 beta Adrenergic Receptors Proteins 0.000 description 1
- 239000002876 beta blocker Substances 0.000 description 1
- 229940097320 beta blocking agent Drugs 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010511 deprotection reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012280 lithium aluminium hydride Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 239000003586 protic polar solvent Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000304 vasodilatating effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/88—Carbazoles; Hydrogenated carbazoles 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 carbon atoms of the ring system
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU9702209A HU9702209D0 (en) | 1997-11-24 | 1997-11-24 | Process for producing pharmaceutical product |
| HU9802180A HU227441B1 (en) | 1997-11-24 | 1998-10-01 | Process for producing carvedilol, enantiomers and salts thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SK156098A3 SK156098A3 (en) | 1999-06-11 |
| SK284109B6 true SK284109B6 (sk) | 2004-09-08 |
Family
ID=89997149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SK1560-98A SK284109B6 (sk) | 1997-11-24 | 1998-11-12 | Spôsob prípravy 1-[9'H-karbazol-4'-yloxy]-3-[{2''-(2'''-<metoxy>- fenoxy)-etyl}-amino]-2-propanolu (karvedilolu) |
Country Status (9)
| Country | Link |
|---|---|
| EP (3) | EP0918055B2 (cs) |
| CZ (2) | CZ296521B6 (cs) |
| DE (2) | DE69823394T2 (cs) |
| ES (2) | ES2221875T3 (cs) |
| HR (1) | HRP980590B1 (cs) |
| HU (1) | HU227441B1 (cs) |
| PL (1) | PL205193B1 (cs) |
| SK (1) | SK284109B6 (cs) |
| UA (1) | UA57737C2 (cs) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010018446A1 (en) | 1999-09-23 | 2001-08-30 | G.D. Searle & Co. | Substituted N-Aliphatic-N-Aromatictertiary-Heteroalkylamines useful for inhibiting cholesteryl ester transfer protein activity |
| DK174645B1 (da) * | 2000-05-18 | 2003-08-04 | Gea Farmaceutisk Fabrik As | Fremgangsmåde og mellemprodukter til fremstillingen af 1-(9H-carbazol-4-yloxy)-3-[2-(2-methoxy-phenoxy)-ethylamino]-propan-2-ol, carvedilol og syreadditionssalte deraf |
| WO2002000216A1 (en) | 2000-06-28 | 2002-01-03 | Teva Pharmaceutical Industries Ltd. | Carvedilol |
| DE60221683T2 (de) * | 2001-09-28 | 2008-04-30 | F. Hoffmann-La Roche Ag | Pseudopolymorphe formen von carvedilol |
| EP1474133A4 (en) * | 2002-01-15 | 2006-02-01 | Teva Pharma | SOLID CRYSTALLINE CARVEDILOL BODIES AND METHODS OF MAKING SAME |
| SK285547B6 (sk) * | 2002-11-08 | 2007-03-01 | Zentiva, A. S. | Spôsob prípravy Carvedilolu |
| EP1615888A1 (en) | 2003-04-21 | 2006-01-18 | Matrix Laboratories Ltd | Process for the preparation of carvedilol form-ii |
| WO2004113296A1 (en) * | 2003-06-20 | 2004-12-29 | Sun Pharmaceutical Industries Limited | A process for preparation of 1-[9h-carbazol-4-yloxy]- 3-[{2-(2-(-(methoxy)phenoxy)-ethyl}-amino]-propan-2-ol |
| GB0411273D0 (en) * | 2004-05-20 | 2004-06-23 | Cipla Ltd | Process and product |
| KR20070088507A (ko) * | 2005-06-09 | 2007-08-29 | 테바 파마슈티컬 인더스트리즈 리미티드 | 카베딜올의 결정질 형태 및 이것의 제조 방법 |
| KR100746455B1 (ko) * | 2006-02-23 | 2007-08-03 | 안국약품 주식회사 | 고광학순도의 키랄 카베딜롤의 제조방법 |
| WO2008002683A2 (en) | 2006-06-28 | 2008-01-03 | Teva Pharmaceutical Industries Ltd. | Polymorphous forms of carvedilol phosphate |
| CZ302357B6 (cs) * | 2007-01-26 | 2011-03-30 | Zentiva, A. S. | Zpusob cištení Carvedilolu |
| WO2009116069A2 (en) * | 2008-02-04 | 2009-09-24 | Ipca Laboratories Limited | Process for preparation of 1-(9h-carbazol-4-yloxy)-3-[[2-(2- methoxyphenoxy) ethyl] amino]-2-propanol |
| WO2009115906A2 (en) * | 2008-03-19 | 2009-09-24 | Cadila Pharmaceuticals Ltd. | An improved process for preparation of carvedilol involving halohydrin derivative |
| WO2009115902A1 (en) * | 2008-03-19 | 2009-09-24 | Cadila Pharmaceuticals Ltd. | Process for the preparation of carvedilol via silyl protection of substituted amine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2815926A1 (de) * | 1978-04-13 | 1979-10-18 | Boehringer Mannheim Gmbh | Neue carbazolyl-(4)-oxy-propanolamin-derivate, verfahren zu ihrer herstellung und diese verbindungen enthaltende arzneimittel |
| DE3319027A1 (de) * | 1983-05-26 | 1984-11-29 | Boehringer Mannheim Gmbh, 6800 Mannheim | Verfahren zur herstellung von optisch aktiven carbazol-derivaten, neue r- und s-carbazol-derivate, sowie arzneimittel, die diese verbindungen enthalten |
| DE3540149A1 (de) † | 1985-11-13 | 1987-05-14 | Boehringer Mannheim Gmbh | Verwendung von 1-(benztriazol-4-yloxy)3-(2-(2-methoxyphenoxy) -ethylamino)-2-propanol als antiglaukommittel, optisch aktive r und s isomere dieser substanz, verfahren zur herstellung derselben sowie arzneimittel, die diese substanzen enthalten |
| US5053514A (en) † | 1988-08-10 | 1991-10-01 | Otsuka Pharmaceutical Company, Limited | Cardiotonics |
-
1998
- 1998-10-01 HU HU9802180A patent/HU227441B1/hu unknown
- 1998-11-04 CZ CZ0356198A patent/CZ296521B6/cs not_active IP Right Cessation
- 1998-11-04 CZ CZ20041111A patent/CZ297445B6/cs not_active IP Right Cessation
- 1998-11-12 SK SK1560-98A patent/SK284109B6/sk not_active IP Right Cessation
- 1998-11-12 HR HR980590A patent/HRP980590B1/xx not_active IP Right Cessation
- 1998-11-23 PL PL329828A patent/PL205193B1/pl not_active IP Right Cessation
- 1998-11-23 UA UA98116157A patent/UA57737C2/uk unknown
- 1998-11-24 ES ES01111213T patent/ES2221875T3/es not_active Expired - Lifetime
- 1998-11-24 DE DE69823394T patent/DE69823394T2/de not_active Expired - Lifetime
- 1998-11-24 EP EP98122114A patent/EP0918055B2/en not_active Expired - Lifetime
- 1998-11-24 EP EP01111214A patent/EP1142874A3/en not_active Withdrawn
- 1998-11-24 EP EP01111213A patent/EP1142873B1/en not_active Expired - Lifetime
- 1998-11-24 ES ES98122114T patent/ES2196459T5/es not_active Expired - Lifetime
- 1998-11-24 DE DE69813729T patent/DE69813729T3/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| HRP980590A2 (en) | 1999-10-31 |
| CZ297445B6 (cs) | 2006-12-13 |
| EP1142873A2 (en) | 2001-10-10 |
| HU227441B1 (en) | 2011-06-28 |
| DE69813729T3 (de) | 2006-11-30 |
| ES2196459T3 (es) | 2003-12-16 |
| PL329828A1 (en) | 1999-06-07 |
| PL205193B1 (pl) | 2010-03-31 |
| DE69823394T2 (de) | 2005-05-04 |
| DE69813729T2 (de) | 2004-02-05 |
| DE69813729D1 (de) | 2003-05-28 |
| EP0918055B2 (en) | 2006-04-26 |
| UA57737C2 (uk) | 2003-07-15 |
| EP1142873B1 (en) | 2004-04-21 |
| HUP9802180A1 (hu) | 2000-12-28 |
| SK156098A3 (en) | 1999-06-11 |
| HU9802180D0 (en) | 1998-11-30 |
| ES2221875T3 (es) | 2005-01-16 |
| HRP980590B1 (en) | 2003-12-31 |
| ES2196459T5 (es) | 2006-12-01 |
| EP0918055A1 (en) | 1999-05-26 |
| CZ356198A3 (cs) | 1999-06-16 |
| CZ296521B6 (cs) | 2006-04-12 |
| EP1142874A3 (en) | 2003-10-22 |
| DE69823394D1 (de) | 2004-05-27 |
| EP1142873A3 (en) | 2003-09-10 |
| EP1142874A2 (en) | 2001-10-10 |
| EP0918055B1 (en) | 2003-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed due to non-payment of maintenance fees |
Effective date: 20141112 |