Wolff; Erich

Patent Applications and Registrations

Patent applications and USPTO patent grants for Wolff; Erich.The latest application filed is for "photographic recording material containing a hydroquinone diether compound".

Company Profile

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Wolff; Erich - Solingen DE
Wolff; Erich - Leverkusen DE
Wolff; Erich - Leichlingen DT

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Photographic recording material containing a hydroquinone diether compound Grant 5,362,615 - Hagemann , et al. November 8, 1	1994-11-08
Photographic recording material Grant 5,134,061 - Wolff July 28, 1	1992-07-28
Color photographic recording material Grant 5,015,565 - Wolff May 14, 1	1991-05-14
Photographic recording material Grant 4,985,351 - Matejec , et al. January 15, 1	1991-01-15
Color photographic recording material with easily dispersible color couplers Grant 4,871,657 - Wolff October 3, 1	1989-10-03
Color photographic recording material containing a color coupler of the pyrazoloazole type Grant 4,845,022 - Wolff July 4, 1	1989-07-04
Color photographic recording material containing a color coupler of the pyrazoloazole series Grant 4,835,094 - Wolff , et al. May 30, 1	1989-05-30
Photographic silver halide material with cross-linked particulate acrylic or methacrylic polymer Grant 4,301,240 - Bruck , et al. November 17, 1	1981-11-17
Polymers which contain urethane groups and which are cross-linkable by vinyl polymerisation Grant 3,928,299 - Rosenkranz , et al. December 23, 1	1975-12-23

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