NL192107C - Werkwijze voor het bromeren of chloreren van een enol- of amidegroep bevattende verbinding. - Google Patents
Werkwijze voor het bromeren of chloreren van een enol- of amidegroep bevattende verbinding. Download PDFInfo
- Publication number
- NL192107C NL192107C NL8000544A NL8000544A NL192107C NL 192107 C NL192107 C NL 192107C NL 8000544 A NL8000544 A NL 8000544A NL 8000544 A NL8000544 A NL 8000544A NL 192107 C NL192107 C NL 192107C
- Authority
- NL
- Netherlands
- Prior art keywords
- solution
- product
- triphenylphosphite
- chlorine
- nmr
- Prior art date
Links
- 150000001875 compounds Chemical class 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 8
- 230000031709 bromination Effects 0.000 title claims description 5
- 238000005893 bromination reaction Methods 0.000 title claims description 5
- 238000005660 chlorination reaction Methods 0.000 title claims description 5
- 125000003368 amide group Chemical group 0.000 title claims description 4
- 150000002085 enols Chemical class 0.000 title claims description 4
- 239000000047 product Substances 0.000 claims description 32
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 28
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 21
- 239000000460 chlorine Substances 0.000 claims description 16
- 229910052801 chlorine Inorganic materials 0.000 claims description 15
- 229910052736 halogen Inorganic materials 0.000 claims description 15
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 14
- 150000002367 halogens Chemical class 0.000 claims description 14
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 12
- 229910052794 bromium Inorganic materials 0.000 claims description 12
- -1 vinyl halide Chemical class 0.000 claims description 12
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 11
- 239000003960 organic solvent Substances 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- 239000011541 reaction mixture Substances 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229930186147 Cephalosporin Natural products 0.000 claims description 4
- 229930182555 Penicillin Natural products 0.000 claims description 4
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 claims description 4
- 229940124587 cephalosporin Drugs 0.000 claims description 4
- 150000001780 cephalosporins Chemical class 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 4
- 229940049954 penicillin Drugs 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- OYGOEELRIGAOLY-UHFFFAOYSA-N [Cl].C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 Chemical compound [Cl].C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 OYGOEELRIGAOLY-UHFFFAOYSA-N 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- JSYGRUBHOCKMGQ-UHFFFAOYSA-N dichloramine Chemical compound ClNCl JSYGRUBHOCKMGQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000001394 phosphorus-31 nuclear magnetic resonance spectrum Methods 0.000 claims 2
- XVMSFILGAMDHEY-UHFFFAOYSA-N 6-(4-aminophenyl)sulfonylpyridin-3-amine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=N1 XVMSFILGAMDHEY-UHFFFAOYSA-N 0.000 claims 1
- 238000005481 NMR spectroscopy Methods 0.000 claims 1
- 238000004458 analytical method Methods 0.000 claims 1
- 230000005587 bubbling Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 239000000706 filtrate Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000002904 solvent Substances 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 6
- 230000002140 halogenating effect Effects 0.000 description 5
- 230000026030 halogenation Effects 0.000 description 4
- 238000005658 halogenation reaction Methods 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 101100353042 Mycobacterium bovis (strain BCG / Pasteur 1173P2) lnt gene Proteins 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 150000008282 halocarbons Chemical class 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 2
- 235000011007 phosphoric acid Nutrition 0.000 description 2
- UHZYTMXLRWXGPK-UHFFFAOYSA-N phosphorus pentachloride Chemical compound ClP(Cl)(Cl)(Cl)Cl UHZYTMXLRWXGPK-UHFFFAOYSA-N 0.000 description 2
- 101150028022 ppm1 gene Proteins 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003512 tertiary amines Chemical class 0.000 description 2
- GVUWLLDNKRCEEE-UHFFFAOYSA-N (2-methylphenyl) dihydrogen phosphite Chemical compound CC1=CC=CC=C1OP(O)O GVUWLLDNKRCEEE-UHFFFAOYSA-N 0.000 description 1
- IQNYBCIGGNQJDL-UHFFFAOYSA-N (4-methylphenyl) dihydrogen phosphite Chemical compound CC1=CC=C(OP(O)O)C=C1 IQNYBCIGGNQJDL-UHFFFAOYSA-N 0.000 description 1
- RMSGQZDGSZOJMU-UHFFFAOYSA-N 1-butyl-2-phenylbenzene Chemical group CCCCC1=CC=CC=C1C1=CC=CC=C1 RMSGQZDGSZOJMU-UHFFFAOYSA-N 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- LLEHHKHIHSRTSN-UHFFFAOYSA-N [Br].C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 Chemical compound [Br].C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 LLEHHKHIHSRTSN-UHFFFAOYSA-N 0.000 description 1
- JMMQBIJIHNRUMC-UHFFFAOYSA-N [Cl].C1=CC(Cl)=CC=C1OP(OC=1C=CC(Cl)=CC=1)OC1=CC=C(Cl)C=C1 Chemical compound [Cl].C1=CC(Cl)=CC=C1OP(OC=1C=CC(Cl)=CC=1)OC1=CC=C(Cl)C=C1 JMMQBIJIHNRUMC-UHFFFAOYSA-N 0.000 description 1
- YYFTXEYMLXCWOS-UHFFFAOYSA-N [Cl].C1=CC(OC)=CC=C1OP(OC=1C=CC(OC)=CC=1)OC1=CC=C(OC)C=C1 Chemical compound [Cl].C1=CC(OC)=CC=C1OP(OC=1C=CC(OC)=CC=1)OC1=CC=C(OC)C=C1 YYFTXEYMLXCWOS-UHFFFAOYSA-N 0.000 description 1
- 125000000738 acetamido group Chemical group [H]C([H])([H])C(=O)N([H])[*] 0.000 description 1
- 125000004442 acylamino group Chemical group 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000001246 bromo group Chemical group Br* 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
- KXDRRFQARLPIBW-UHFFFAOYSA-N tris(2-chlorophenyl) phosphite Chemical compound ClC1=CC=CC=C1OP(OC=1C(=CC=CC=1)Cl)OC1=CC=CC=C1Cl KXDRRFQARLPIBW-UHFFFAOYSA-N 0.000 description 1
- GCJOWNOPRPZJMW-UHFFFAOYSA-N tris(4-bromophenyl) phosphite Chemical compound C1=CC(Br)=CC=C1OP(OC=1C=CC(Br)=CC=1)OC1=CC=C(Br)C=C1 GCJOWNOPRPZJMW-UHFFFAOYSA-N 0.000 description 1
- AMGMFFUMIJRDGW-UHFFFAOYSA-N tris(4-chlorophenyl) phosphite Chemical compound C1=CC(Cl)=CC=C1OP(OC=1C=CC(Cl)=CC=1)OC1=CC=C(Cl)C=C1 AMGMFFUMIJRDGW-UHFFFAOYSA-N 0.000 description 1
- VDAQOERDAAOXQV-UHFFFAOYSA-N tris(4-methoxyphenyl) phosphite Chemical compound C1=CC(OC)=CC=C1OP(OC=1C=CC(OC)=CC=1)OC1=CC=C(OC)C=C1 VDAQOERDAAOXQV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/141—Esters of phosphorous acids
- C07F9/146—Esters of phosphorous acids containing P-halide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/141—Esters of phosphorous acids
- C07F9/145—Esters of phosphorous acids with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/062—Organo-phosphoranes without P-C bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cephalosporin Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US846979 | 1979-02-01 | ||
| US06/008,469 US4230644A (en) | 1979-02-01 | 1979-02-01 | Halogenating reagents |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL8000544A NL8000544A (nl) | 1980-08-05 |
| NL192107B NL192107B (nl) | 1996-10-01 |
| NL192107C true NL192107C (nl) | 1997-02-04 |
Family
ID=21731778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8000544A NL192107C (nl) | 1979-02-01 | 1980-01-29 | Werkwijze voor het bromeren of chloreren van een enol- of amidegroep bevattende verbinding. |
Country Status (42)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR900011745A (ko) * | 1989-01-23 | 1990-08-02 | 레로이 휘테이커 | 할로겐화 공정 |
| CN103588790A (zh) * | 2013-11-29 | 2014-02-19 | 中国科学院长春应用化学研究所 | 7-氨基-3-氯-3-头孢-4-羧酸-对硝基苄基酯的制备方法 |
| CN114591199B (zh) * | 2022-03-17 | 2024-03-12 | 诚弘制药(威海)有限责任公司 | 一种溴乙腈的制备方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3925372A (en) * | 1973-02-23 | 1975-12-09 | Lilly Co Eli | Alpha-aminoacyl-3-halo cephalosporins |
-
1979
- 1979-02-01 US US06/008,469 patent/US4230644A/en not_active Expired - Lifetime
-
1980
- 1980-01-29 NZ NZ192747A patent/NZ192747A/xx unknown
- 1980-01-29 ZA ZA00800520A patent/ZA80520B/xx unknown
- 1980-01-29 AU AU55027/80A patent/AU532614B2/en not_active Expired
- 1980-01-29 HU HU80191A patent/HU182094B/hu unknown
- 1980-01-29 NL NL8000544A patent/NL192107C/nl not_active IP Right Cessation
- 1980-01-29 MA MA18911A patent/MA18714A1/fr unknown
- 1980-01-29 IL IL59267A patent/IL59267A/xx unknown
- 1980-01-29 PT PT70743A patent/PT70743A/pt active IP Right Revival
- 1980-01-29 YU YU00226/80A patent/YU22680A/xx unknown
- 1980-01-29 GR GR61066A patent/GR71613B/el unknown
- 1980-01-30 BG BG046410A patent/BG34462A3/xx unknown
- 1980-01-30 BE BE1/9700A patent/BE881424A/fr not_active IP Right Cessation
- 1980-01-30 FR FR8001967A patent/FR2447928B1/fr not_active Expired
- 1980-01-30 GT GT198061668A patent/GT198061668A/es unknown
- 1980-01-30 CA CA344,681A patent/CA1133007A/en not_active Expired
- 1980-01-31 NO NO800250A patent/NO161260C/no unknown
- 1980-01-31 IT IT8019608A patent/IT1212406B/it active
- 1980-01-31 EP EP80300282A patent/EP0015079B1/en not_active Expired
- 1980-01-31 GB GB8003292A patent/GB2044266B/en not_active Expired
- 1980-01-31 CH CH79680A patent/CH643855A5/fr not_active IP Right Cessation
- 1980-01-31 JP JP1196580A patent/JPS55104291A/ja active Granted
- 1980-01-31 CS CS80659A patent/CS215128B2/cs unknown
- 1980-01-31 DE DE8080300282T patent/DE3072025D1/de not_active Expired
- 1980-01-31 DK DK41280A patent/DK147886C/da active
- 1980-01-31 IE IE189/80A patent/IE49505B1/en not_active IP Right Cessation
- 1980-01-31 LU LU82119A patent/LU82119A1/fr unknown
- 1980-01-31 AT AT0050080A patent/AT386209B/de not_active IP Right Cessation
- 1980-02-01 OA OA57010A patent/OA06450A/xx unknown
- 1980-02-01 KR KR1019800000399A patent/KR840000298B1/ko not_active Expired
- 1980-02-01 FI FI800302A patent/FI72728C/fi not_active IP Right Cessation
- 1980-02-01 DD DD80218817A patent/DD148954A1/xx unknown
- 1980-02-01 MW MW6/80A patent/MW680A1/xx unknown
- 1980-02-01 MX MX808626U patent/MX6199E/es unknown
- 1980-02-01 RO RO80100057A patent/RO79358A/ro unknown
- 1980-02-01 ZM ZM11/80A patent/ZM1180A1/xx unknown
- 1980-02-01 SU SU802877706A patent/SU982545A3/ru active
- 1980-02-01 PL PL1980221746A patent/PL120667B1/pl unknown
- 1980-02-01 ES ES488230A patent/ES488230A0/es active Granted
-
1985
- 1985-12-30 MY MY571/85A patent/MY8500571A/xx unknown
-
1987
- 1987-09-22 MY MYPI87001867A patent/MY102552A/en unknown
-
1988
- 1988-01-08 SG SG36/88A patent/SG3688G/en unknown
- 1988-06-02 HK HK420/88A patent/HK42088A/en not_active IP Right Cessation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A85 | Still pending on 85-01-01 | ||
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| V4 | Discontinued because of reaching the maximum lifetime of a patent |
Free format text: 20000129 |