Inventor · disambiguated record
Naohiro Yoshikawa
Also filed as: YOSHIKAWA NAOHIRO
5 granted patents·1 pending application·9 citations·filing 1990–2009
71Inventor score
Files withSUMITOMO SEIKA CHEMICALS6
Top patents by PatentIndex Score
6 records- 0158US5310940AProduction of thiophene-2,5-dicarboxylic acid diesters, tetrahydrothiophene-2,5-dicarboxylic acid diesters and dibenzoxazolylthiophenesSUMITOMO SEIKA CHEMICALS·Filed 1993·Granted May 10, 1994·6 cites·13 claims
- 0253US2010324299A1Method for purification of pyridine, and method for production of chlorinated pyridineSUMITOMO SEIKA CHEMICALS·Filed 2009·Application pending·0 cites
- 0342US5093504AProduction of thiophene-2,5-dicarboxylic acid diesters, tetrahydrothiophene-2,5-dicarboxylic acid diesters and dibenzoxazolylthiophenesSUMITOMO SEIKA CHEMICALS·Filed 1990·Granted Mar 3, 1992·2 cites·2 claims
- 0437US5352821A2,5-dichlorophenylthioglycolic acid derivative and method for its productionSUMITOMO SEIKA CHEMICALS·Filed 1993·Granted Oct 4, 1994·1 cites·13 claims
- 0531US5210287A2,5-dichlorophenylthioglycolic acid derivative and method for its productionSUMITOMO SEIKA CHEMICALS·Filed 1992·Granted May 11, 1993·0 cites·4 claims
- 0627US5221749AProduction of dibenzoxazolylthiophenesSUMITOMO SEIKA CHEMICALS·Filed 1991·Granted Jun 22, 1993·0 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →