Inventor · disambiguated record
Takeaki Umemura
Also filed as: UMEMURA TAKEAKI
8 granted patents·34 citations·filing 1975–1986
83Inventor score
Files withSUMITOMO CHEMICAL CO8
Top patents by PatentIndex Score
8 records- 0169US4752417AMethod for optical resolution of phenylacetic acid derivativeSUMITOMO CHEMICAL CO·Filed 1986·Granted Jun 21, 1988·11 cites·11 claims
- 0265US4293702AMethod for preparing 4-substituted-N-methylbenzothiazolone derivativesSUMITOMO CHEMICAL CO·Filed 1979·Granted Oct 6, 1981·6 cites·9 claims
- 0364US4012428AMethod for preparing 3-methyl-2-(4-halogenophenyl)-butyronitrileSUMITOMO CHEMICAL CO·Filed 1975·Granted Mar 15, 1977·7 cites·4 claims
- 0451US4571436AProcess for producing optically active cyclopentenolonesSUMITOMO CHEMICAL CO·Filed 1984·Granted Feb 18, 1986·4 cites·23 claims
- 0542US4552703AProduction of optically active cyclopentenolonesSUMITOMO CHEMICAL CO·Filed 1984·Granted Nov 12, 1985·2 cites·13 claims
- 0642US3981919ARacemization of optically active allethroloneSUMITOMO CHEMICAL CO·Filed 1975·Granted Sep 21, 1976·2 cites·8 claims
- 0735US4001334ARacemization of optically active allethroloneSUMITOMO CHEMICAL CO·Filed 1975·Granted Jan 4, 1977·2 cites·4 claims
- 0828US4144264AProcess for producing a 3-methyl-2-(4-halophenyl)butyronitrileSUMITOMO CHEMICAL CO·Filed 1977·Granted Mar 13, 1979·0 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Takeaki Umemura files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →