Inventor · disambiguated record
Sigberg Pfohl
Also filed as: PFOHL SIGBERG · SCHULZ BERNHARD
11 granted patents·367 citations·filing 1975–1991
92Inventor score
Files withBASF AG11
Top patents by PatentIndex Score
11 records- 0196US4774285APreparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paperBASF AG·Filed 1986·Granted Sep 27, 1988·109 cites·14 claims
- 0295US4880497APreparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paperBASF AG·Filed 1988·Granted Nov 14, 1989·86 cites·8 claims
- 0390US4978427AWater-soluble copolymers containing vinylamine units as wet strength and dry strength agent for paperBASF AG·Filed 1989·Granted Dec 18, 1990·53 cites·11 claims
- 0484US4818341AProduction of paper and paperboard of high dry strengthBASF AG·Filed 1988·Granted Apr 4, 1989·50 cites·6 claims
- 0582US3996246AResolution of racemic pantolactoneBASF AG·Filed 1975·Granted Dec 7, 1976·11 cites·2 claims
- 0679US4191692AManufacture of tocopherolBASF AG·Filed 1978·Granted Mar 4, 1980·11 cites·13 claims
- 0764US4804387ALiquid black dye mixtureBASF AG·Filed 1987·Granted Feb 14, 1989·7 cites·4 claims
- 0860US5131981AColoring paperBASF AG·Filed 1991·Granted Jul 21, 1992·21 cites·7 claims
- 0953US4081477APinane derivativesBASF AG·Filed 1975·Granted Mar 28, 1978·3 cites·3 claims
- 1047US4294873AManufacture of paper having a high dry strength and a low wet strengthBASF AG·Filed 1980·Granted Oct 13, 1981·11 cites·5 claims
- 1139US4784724AMaking paper which has a high dry strengthBASF AG·Filed 1986·Granted Nov 15, 1988·5 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →