Inventor · disambiguated record
Ka-Kong Chan
Also filed as: CHAN KA-KONG
40 granted patents·115 citations·filing 1975–1991
97Inventor score
Files withHOFFMANN LA ROCHE40
Top patents by PatentIndex Score
40 records- 0183US4171318AFluorinated polyenesHOFFMANN LA ROCHE·Filed 1978·Granted Oct 16, 1979·19 cites·20 claims
- 0273US4345084AUnsaturated eicosanoic acidsHOFFMANN LA ROCHE·Filed 1981·Granted Aug 17, 1982·10 cites·9 claims
- 0372US4898962ANatural vitamin E intermediateHOFFMANN LA ROCHE·Filed 1989·Granted Feb 6, 1990·9 cites·1 claims
- 0466US4045475AOptically active alcohols and lower esters thereofHOFFMANN LA ROCHE·Filed 1976·Granted Aug 30, 1977·7 cites·6 claims
- 0562US4642364AUnsaturated eicosanoic acidsHOFFMANN LA ROCHE·Filed 1986·Granted Feb 10, 1987·11 cites·5 claims
- 0661US4137246AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1977·Granted Jan 30, 1979·4 cites·17 claims
- 0761US4029678AAsymmetric synthesisHOFFMANN LA ROCHE·Filed 1975·Granted Jun 14, 1977·2 cites·3 claims
- 0860US4016178ASynthesis of vitamin EHOFFMANN LA ROCHE·Filed 1975·Granted Apr 5, 1977·2 cites·2 claims
- 0958US4914217AAsymmetric synthesis of natural vitamin EHOFFMANN LA ROCHE·Filed 1989·Granted Apr 3, 1990·4 cites·2 claims
- 1058US4201727AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1979·Granted May 6, 1980·4 cites·4 claims
- 1156US4900476AQuinone intermediates for asymmetric synthesis of natural vitamin EHOFFMANN LA ROCHE·Filed 1989·Granted Feb 13, 1990·4 cites·3 claims
- 1256US4375563AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1982·Granted Mar 1, 1983·4 cites·7 claims
- 1355US4599443AUnsaturated eicosanoic acidsHOFFMANN LA ROCHE·Filed 1984·Granted Jul 8, 1986·3 cites·1 claims
- 1454US4831185AAsymmetric synthesis of natural vitamin EHOFFMANN LA ROCHE·Filed 1987·Granted May 16, 1989·4 cites·17 claims
- 1554US4000169AAsymmetric synthesis of optically active compoundsHOFFMANN LA ROCHE·Filed 1975·Granted Dec 28, 1976·3 cites·13 claims
- 1652US4097495ATetramethyl-benzyloxy chromansHOFFMANN LA ROCHE·Filed 1977·Granted Jun 27, 1978·1 cites·1 claims
- 1752US4076739ASynthesis of vitamin EHOFFMANN LA ROCHE·Filed 1976·Granted Feb 28, 1978·1 cites·4 claims
- 1851US4855085AAsymmetric synthesis of natural vitamin EHOFFMANN LA ROCHE·Filed 1989·Granted Aug 8, 1989·2 cites·3 claims
- 1951US4110346ATetramethyl chromanyl pentane derivativesHOFFMANN LA ROCHE·Filed 1976·Granted Aug 29, 1978·1 cites·7 claims
- 2051US4100175AClaisen intermediatesHOFFMANN LA ROCHE·Filed 1977·Granted Jul 11, 1978·1 cites·1 claims
- 2151US4086249ATetramethyl chromanyl pentane amideHOFFMANN LA ROCHE·Filed 1976·Granted Apr 25, 1978·1 cites·4 claims
- 2245US5147871AAnti-bacterial cephalosporin compoundsHOFFMANN LA ROCHE·Filed 1991·Granted Sep 15, 1992·11 cites·45 claims
- 2341US4266073AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1979·Granted May 5, 1981·1 cites·11 claims
- 2441US4231944AFluorinated polyenesHOFFMANN LA ROCHE·Filed 1979·Granted Nov 4, 1980·1 cites·5 claims
- 2540US4395575A5(Halophenyl)-2-fluoro-pentadienalsHOFFMANN LA ROCHE·Filed 1982·Granted Jul 26, 1983·1 cites·2 claims
- 2640US4338253AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1981·Granted Jul 6, 1982·1 cites·11 claims
- 2740US4321209AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1980·Granted Mar 23, 1982·1 cites·2 claims
- 2840US4299995AFluorinated polyenesHOFFMANN LA ROCHE·Filed 1980·Granted Nov 10, 1981·1 cites·2 claims
- 2939US4500462AUnsaturated eicosanoic acidsHOFFMANN LA ROCHE·Filed 1982·Granted Feb 19, 1985·1 cites·10 claims
- 3038US4094885A6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl-4-hexenoic acid derivativesHOFFMANN LA ROCHE·Filed 1977·Granted Jun 13, 1978·0 cites·3 claims
- 3138US4093632A6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl hexanol derivativesHOFFMANN LA ROCHE·Filed 1977·Granted Jun 6, 1978·0 cites·2 claims
- 3238US4088662AOptically active amides and process for producing the sameHOFFMANN LA ROCHE·Filed 1976·Granted May 9, 1978·0 cites·6 claims
- 3336US4913851AAsymmetric synthesis of natural vitamin E.HOFFMANN LA ROCHE·Filed 1989·Granted Apr 3, 1990·0 cites·1 claims
- 3436US4160865AAsymmetric synthesisHOFFMANN LA ROCHE·Filed 1977·Granted Jul 10, 1979·0 cites·2 claims
- 3536US4102909AOptically active esters and amidesHOFFMANN LA ROCHE·Filed 1977·Granted Jul 25, 1978·0 cites·3 claims
- 3636US4094892AProcess for preparing optically active estersHOFFMANN LA ROCHE·Filed 1977·Granted Jun 13, 1978·0 cites·1 claims
- 3734US4898953ANatural Vitamin E intermediateHOFFMANN LA ROCHE·Filed 1989·Granted Feb 6, 1990·0 cites·3 claims
- 3834US4335248AFluorinated polyenesHOFFMANN LA ROCHE·Filed 1981·Granted Jun 15, 1982·0 cites·6 claims
- 3934US4151360AOptically active amine saltsHOFFMANN LA ROCHE·Filed 1977·Granted Apr 24, 1979·0 cites·2 claims
- 4033US4169100AFluorinated aromatic polyenesHOFFMANN LA ROCHE·Filed 1978·Granted Sep 25, 1979·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →