Inventor · disambiguated record
Siegfried Schiessler
Also filed as: SCHIESSLER SIEGFRIED
15 granted patents·106 citations·filing 1973–1995
92Inventor score
Files withHOECHST AG15
Top patents by PatentIndex Score
15 records- 0184US4018791AProcess for the preparation of highly pure halogenated phthalocyanine pigmentHOECHST AG·Filed 1973·Granted Apr 19, 1977·12 cites·2 claims
- 0279US5071483AProcess for the preparation of pigment preparations of the anthanthrone seriesHOECHST AG·Filed 1989·Granted Dec 10, 1991·14 cites·11 claims
- 0378US5071482APigment preparationsHOECHST AG·Filed 1989·Granted Dec 10, 1991·13 cites·15 claims
- 0474US4224222AProcess for preparing copper phthalocyanine pigments of the α-modificationHOECHST AG·Filed 1978·Granted Sep 23, 1980·8 cites·4 claims
- 0573US4153602AProcess for the preparation of a N,N'-dimethyl-perylene-3,4,9,10-tetracarboxylic acid diimide pigmentHOECHST AG·Filed 1976·Granted May 8, 1979·8 cites·11 claims
- 0667US5698705AIsoindoline pigmentsHOECHST AG·Filed 1995·Granted Dec 16, 1997·11 cites·11 claims
- 0762US4056534AProcess for preparing copper phthalocyanine pigments of the α-modificationHOECHST AG·Filed 1975·Granted Nov 1, 1977·6 cites·3 claims
- 0861US3972987AProcess for regenerating sulfuric acidHOECHST AG·Filed 1974·Granted Aug 3, 1976·10 cites·21 claims
- 0959US4010180AProcess for the purification of copper phthalocyanineHOECHST AG·Filed 1973·Granted Mar 1, 1977·4 cites·6 claims
- 1052US5329046ABiscationic acid amide and imide derivatives and processes for their preparationHOECHST AG·Filed 1990·Granted Jul 12, 1994·4 cites·6 claims
- 1151US5074919APreparation of vat dyes and pigments of the perinone seriesHOECHST AG·Filed 1989·Granted Dec 24, 1991·4 cites·11 claims
- 1249US4010240AProcess for the regeneration of sulfuric acidHOECHST AG·Filed 1974·Granted Mar 1, 1977·7 cites·10 claims
- 1345US4599431AProcess for the preparation of naphthalene-1,4,5,8-tetracarboxylic acid and its 1,8-monoanhydride in a high degree of purityHOECHST AG·Filed 1984·Granted Jul 8, 1986·2 cites·8 claims
- 1437US4684753AProcess for preparing 1,3,6,8-tetrabromopyreneHOECHST AG·Filed 1986·Granted Aug 4, 1987·1 cites·7 claims
- 1533US4939193AUse of the alpha-modification of cis-naphthoylenebis(benzimidazole) for pigmenting polyolefinsHOECHST AG·Filed 1988·Granted Jul 3, 1990·2 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →