ZA200105925B - Method for producing derivatives of biphenyl-2-carboxylic acid. - Google Patents
Method for producing derivatives of biphenyl-2-carboxylic acid. Download PDFInfo
- Publication number
- ZA200105925B ZA200105925B ZA200105925A ZA200105925A ZA200105925B ZA 200105925 B ZA200105925 B ZA 200105925B ZA 200105925 A ZA200105925 A ZA 200105925A ZA 200105925 A ZA200105925 A ZA 200105925A ZA 200105925 B ZA200105925 B ZA 200105925B
- Authority
- ZA
- South Africa
- Prior art keywords
- optionally
- phenyl
- hydroxy
- substituted
- process according
- Prior art date
Links
- ILYSAKHOYBPSPC-UHFFFAOYSA-N 2-phenylbenzoic acid Chemical class OC(=O)C1=CC=CC=C1C1=CC=CC=C1 ILYSAKHOYBPSPC-UHFFFAOYSA-N 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 42
- 229910052799 carbon Inorganic materials 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 32
- -1 oxazolin-2-yl group Chemical group 0.000 claims description 25
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
- 239000003960 organic solvent Substances 0.000 claims description 17
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 229910052731 fluorine Inorganic materials 0.000 claims description 14
- 239000011737 fluorine Substances 0.000 claims description 14
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 13
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 12
- 229910052794 bromium Chemical group 0.000 claims description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 12
- 239000000460 chlorine Chemical group 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 12
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 10
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 10
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 10
- 238000007127 saponification reaction Methods 0.000 claims description 9
- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 8
- 150000002367 halogens Chemical group 0.000 claims description 8
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 8
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 8
- 239000007858 starting material Substances 0.000 claims description 8
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 6
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 claims description 6
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 6
- 125000004008 6 membered carbocyclic group Chemical group 0.000 claims description 4
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 4
- 125000001153 fluoro group Chemical group F* 0.000 claims description 4
- ZSTUEICKYWFYIC-UHFFFAOYSA-N 2-(4-methylphenyl)benzoic acid Chemical compound C1=CC(C)=CC=C1C1=CC=CC=C1C(O)=O ZSTUEICKYWFYIC-UHFFFAOYSA-N 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 125000001054 5 membered carbocyclic group Chemical group 0.000 claims description 2
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 2
- 125000003754 ethoxycarbonyl group Chemical group C(=O)(OCC)* 0.000 claims description 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 claims description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 2
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 claims description 2
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 claims description 2
- 125000004076 pyridyl group Chemical group 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 5
- GRFOHUBBUMAJMM-UHFFFAOYSA-N 3-(2-aminoquinolin-3-yl)-n-cyclohexyl-n-methylpropanamide Chemical compound C=1C2=CC=CC=C2N=C(N)C=1CCC(=O)N(C)C1CCCCC1 GRFOHUBBUMAJMM-UHFFFAOYSA-N 0.000 claims 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 26
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 239000002904 solvent Substances 0.000 description 9
- 210000003298 dental enamel Anatomy 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 5
- 239000006286 aqueous extract Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- UABFDXDSFKGWJM-UHFFFAOYSA-N 2-(2-methoxyphenyl)-4,5-dihydro-1,3-oxazole Chemical class COC1=CC=CC=C1C1=NCCO1 UABFDXDSFKGWJM-UHFFFAOYSA-N 0.000 description 2
- JUNZDJNCZJUDRU-UHFFFAOYSA-N 4,4-dimethyl-2-[2-(4-methylphenyl)phenyl]-5h-1,3-oxazole Chemical group C1=CC(C)=CC=C1C1=CC=CC=C1C1=NC(C)(C)CO1 JUNZDJNCZJUDRU-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- WMFOQBRAJBCJND-UHFFFAOYSA-M lithium hydroxide Inorganic materials [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 238000005580 one pot reaction Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- YEBXJRBNPTUQKG-UHFFFAOYSA-N 1,1'-biphenyl;4,5-dihydro-1,3-oxazole Chemical compound C1CN=CO1.C1=CC=CC=C1C1=CC=CC=C1 YEBXJRBNPTUQKG-UHFFFAOYSA-N 0.000 description 1
- AZQQFCSRBIOXMN-UHFFFAOYSA-N 2-(2-phenylphenyl)-4,5-dihydro-1,3-oxazole Chemical group O1CCN=C1C1=CC=CC=C1C1=CC=CC=C1 AZQQFCSRBIOXMN-UHFFFAOYSA-N 0.000 description 1
- MUFNIUXQTXCXFN-UHFFFAOYSA-N 4,4-dimethyl-2-(2-phenylphenyl)-5h-1,3-oxazole Chemical group CC1(C)COC(C=2C(=CC=CC=2)C=2C=CC=CC=2)=N1 MUFNIUXQTXCXFN-UHFFFAOYSA-N 0.000 description 1
- 229940123413 Angiotensin II antagonist Drugs 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000002333 angiotensin II receptor antagonist Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002918 oxazolines Chemical class 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19908504A DE19908504C2 (de) | 1999-02-26 | 1999-02-26 | Großtechnisches Verfahren zur Herstellung von Derivaten der Biphenyl-2-carbonsäure durch Verseifen eines (2-Oxazolinyl)-2-biphenyl-Derivats mit Salzsäure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200105925B true ZA200105925B (en) | 2003-01-07 |
Family
ID=7899061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200105925A ZA200105925B (en) | 1999-02-26 | 2001-07-18 | Method for producing derivatives of biphenyl-2-carboxylic acid. |
Country Status (34)
| Country | Link |
|---|---|
| EP (1) | EP1169289B1 (pt) |
| JP (1) | JP4558946B2 (pt) |
| KR (1) | KR100683432B1 (pt) |
| CN (1) | CN1222500C (pt) |
| AR (1) | AR022772A1 (pt) |
| AT (1) | ATE253034T1 (pt) |
| AU (1) | AU781070B2 (pt) |
| BG (1) | BG105780A (pt) |
| BR (1) | BR0008483B1 (pt) |
| CA (1) | CA2364862C (pt) |
| CO (1) | CO5160249A1 (pt) |
| CZ (1) | CZ299385B6 (pt) |
| DE (2) | DE19908504C2 (pt) |
| DK (1) | DK1169289T3 (pt) |
| EA (1) | EA003948B1 (pt) |
| EE (1) | EE200100448A (pt) |
| ES (1) | ES2208284T3 (pt) |
| HK (1) | HK1042289B (pt) |
| HR (1) | HRP20010616A2 (pt) |
| HU (1) | HU227949B1 (pt) |
| IL (2) | IL144619A0 (pt) |
| NO (1) | NO20014045D0 (pt) |
| NZ (1) | NZ514365A (pt) |
| PE (1) | PE20001490A1 (pt) |
| PL (1) | PL198060B1 (pt) |
| PT (1) | PT1169289E (pt) |
| SK (1) | SK12142001A3 (pt) |
| TR (1) | TR200102476T2 (pt) |
| TW (1) | TWI274051B (pt) |
| UA (1) | UA58631C2 (pt) |
| UY (1) | UY26035A1 (pt) |
| WO (1) | WO2000051961A1 (pt) |
| YU (1) | YU60401A (pt) |
| ZA (1) | ZA200105925B (pt) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355717C (zh) * | 2005-12-09 | 2007-12-19 | 浙江工业大学 | 一种联苯－2－羧酸的合成方法 |
| RU2484117C2 (ru) * | 2011-03-30 | 2013-06-10 | Учреждение Российской Академии Наук Институт Проблем Химической Физики Ран (Ипхф Ран) | Применение производных 4-бифенилкарбоновой кислоты в качестве органического механолюминесцентного материала и механолюминесцентная композиция |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223058A (en) * | 1975-08-15 | 1977-02-21 | Sankyo Co Ltd | Preparation of indanylpropionic acid derivatives |
| GB1592161A (en) * | 1976-08-13 | 1981-07-01 | Secr Defence | Biphenyl carboxylic esters and their use as liquid crystal materials |
| US4710513A (en) * | 1979-08-17 | 1987-12-01 | Merck & Co., Inc. | Substituted pyranone inhibitors of cholesterol synthesis |
| IE52630B1 (en) * | 1981-03-11 | 1988-01-06 | Wellcome Found | Substituted biphenyl compounds |
| JPH051002A (ja) * | 1991-02-15 | 1993-01-08 | Nikko Kyodo Co Ltd | α−アミノ酸の製造方法 |
| JPH0761952A (ja) * | 1993-06-17 | 1995-03-07 | Eisai Kagaku Kk | ハロメチル−ビフェニルカルボン酸エステル誘導体の製造法 |
| JP3420321B2 (ja) * | 1994-02-03 | 2003-06-23 | 北陸製薬株式会社 | ２，４，５−トリハロゲノ−３−メチル安息香酸の製造方法 |
| WO1997045397A1 (en) * | 1996-05-30 | 1997-12-04 | Hoechst Marion Roussel, Inc. | Alkyloxyamino substituted fluorenones and their use as protein kinase c inhibitors |
| DE19632643C1 (de) * | 1996-08-13 | 1998-01-22 | Great Lakes Chem Konstanz Gmbh | Katalysierte Kopplung von Arylmagnesiumhalogeniden und Bromarylcarbonsäureverbindungen zur Herstellung von Biphenylcarbonsäuren |
| DE69904981T2 (de) * | 1998-04-21 | 2003-08-07 | Dow Agrosciences Llc | Metallsalz katalysiertes Verfahren zur Gewinnung von Oxazolinen und nachträgliche Herstellung von Chloroketonen |
-
1999
- 1999-02-26 DE DE19908504A patent/DE19908504C2/de not_active Expired - Fee Related
-
2000
- 2000-02-12 NZ NZ514365A patent/NZ514365A/en not_active IP Right Cessation
- 2000-02-12 KR KR1020017010739A patent/KR100683432B1/ko not_active IP Right Cessation
- 2000-02-12 CA CA002364862A patent/CA2364862C/en not_active Expired - Fee Related
- 2000-02-12 DE DE50004257T patent/DE50004257D1/de not_active Expired - Lifetime
- 2000-02-12 PT PT00907558T patent/PT1169289E/pt unknown
- 2000-02-12 IL IL14461900A patent/IL144619A0/xx active IP Right Grant
- 2000-02-12 EA EA200100831A patent/EA003948B1/ru not_active IP Right Cessation
- 2000-02-12 AT AT00907558T patent/ATE253034T1/de active
- 2000-02-12 TR TR2001/02476T patent/TR200102476T2/xx unknown
- 2000-02-12 AU AU29110/00A patent/AU781070B2/en not_active Ceased
- 2000-02-12 WO PCT/EP2000/001162 patent/WO2000051961A1/de active IP Right Grant
- 2000-02-12 SK SK1214-2001A patent/SK12142001A3/sk unknown
- 2000-02-12 CZ CZ20013080A patent/CZ299385B6/cs not_active IP Right Cessation
- 2000-02-12 DK DK00907558T patent/DK1169289T3/da active
- 2000-02-12 HU HU0200271A patent/HU227949B1/hu not_active IP Right Cessation
- 2000-02-12 ES ES00907558T patent/ES2208284T3/es not_active Expired - Lifetime
- 2000-02-12 JP JP2000602190A patent/JP4558946B2/ja not_active Expired - Lifetime
- 2000-02-12 YU YU60401A patent/YU60401A/sh unknown
- 2000-02-12 PL PL349464A patent/PL198060B1/pl unknown
- 2000-02-12 CN CNB008042160A patent/CN1222500C/zh not_active Expired - Fee Related
- 2000-02-12 EP EP00907558A patent/EP1169289B1/de not_active Expired - Lifetime
- 2000-02-12 EE EEP200100448A patent/EE200100448A/xx unknown
- 2000-02-12 BR BRPI0008483-2A patent/BR0008483B1/pt not_active IP Right Cessation
- 2000-02-23 CO CO00012756A patent/CO5160249A1/es unknown
- 2000-02-24 PE PE2000000152A patent/PE20001490A1/es not_active Application Discontinuation
- 2000-02-25 AR ARP000100847A patent/AR022772A1/es active Pending
- 2000-02-25 TW TW089103323A patent/TWI274051B/zh not_active IP Right Cessation
- 2000-02-25 UY UY26035A patent/UY26035A1/es unknown
- 2000-12-02 UA UA2001096607A patent/UA58631C2/uk unknown
-
2001
- 2001-07-18 ZA ZA200105925A patent/ZA200105925B/en unknown
- 2001-07-30 IL IL144619A patent/IL144619A/en not_active IP Right Cessation
- 2001-08-03 BG BG105780A patent/BG105780A/xx active Pending
- 2001-08-20 NO NO20014045A patent/NO20014045D0/no not_active Application Discontinuation
- 2001-08-23 HR HR20010616A patent/HRP20010616A2/hr not_active Application Discontinuation
-
2002
- 2002-05-22 HK HK02103840.4A patent/HK1042289B/zh not_active IP Right Cessation
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