Inventor

HOTTA SEIJI

7 patents

Patents

7 patents

US4028331AJun 7, 1977

Ultra violet absorber

SUMITOMO CHEMICAL CO20 citations79

US4301227ANov 17, 1981

Electrophotographic liquid developer

SUMITOMO CHEMICAL CO14 citations66

US4055565AOct 25, 1977

Optical brightening agents of naphthalimide derivatives

SUMITOMO CHEMICAL CO5 citations60

US3980577ASep 14, 1976

Diphenylmethane electrophotographic liquid developer

SUMITOMO CHEMICAL CO6 citations60

US4156682AMay 29, 1979

Fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO5 citations58

US4024157AMay 17, 1977

Fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO4 citations58

US3947471AMar 30, 1976

Benz (c) fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO5 citations57