Inventor · disambiguated record
Katsumasa Otake
Also filed as: OTAKE KATSUMASA
8 granted patents·100 citations·filing 1983–1985
87Inventor score
Files withSUMITOMO CHEMICAL CO8
Top patents by PatentIndex Score
8 records- 0188US4937326AReactive scarlet dyes having both monochlorotriazinyl and vinylsulfone type reactive groups linked via N-alkylated aminoSUMITOMO CHEMICAL CO·Filed 1985·Granted Jun 26, 1990·24 cites·11 claims
- 0284US4935500AMetallized formazan compounds having two fiber reactive groups linked by n-alkyl-containing groupSUMITOMO CHEMICAL CO·Filed 1983·Granted Jun 19, 1990·17 cites·8 claims
- 0380US4631341AAnthraquinone compound having both monohalogenotriazinyl and vinylsulfone type fiber reactive groupsSUMITOMO CHEMICAL CO·Filed 1984·Granted Dec 23, 1986·13 cites·4 claims
- 0478US4841031AReactive dye having both monochlorotriazinyl and vinylsulfone type reactive groupsSUMITOMO CHEMICAL CO·Filed 1984·Granted Jun 20, 1989·11 cites·6 claims
- 0564US4626589AOrganic dye compound having both pyridiniotriazinyl and vinylsulfone type fiber-reactive groupsSUMITOMO CHEMICAL CO·Filed 1985·Granted Dec 2, 1986·13 cites·6 claims
- 0654US4511507AMonoazo compound having both monochlorotriazinyl and vinylsulfone type reactive groupsSUMITOMO CHEMICAL CO·Filed 1983·Granted Apr 16, 1985·7 cites·5 claims
- 0747US4540418AReactive dye compositionSUMITOMO CHEMICAL CO·Filed 1984·Granted Sep 10, 1985·10 cites·8 claims
- 0836US4551150AMethod for dyeing cellulose fiber material using fiber-reactive disazo dye and finishing the sameSUMITOMO CHEMICAL CO·Filed 1984·Granted Nov 5, 1985·5 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Katsumasa Otake 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 →