Inventor · disambiguated record
Ernst Schefczik
Also filed as: SCHEFCZIK ERNST
50 granted patents·398 citations·filing 1973–1996
98Inventor score
Top patents by PatentIndex Score
50 records- 0187US4939012ANaphtholactam dyes and optical recording medium containing these dyesBASF AG·Filed 1989·Granted Jul 3, 1990·35 cites·3 claims
- 0285US4774324AIsothiazolylazo dyesBASF AG·Filed 1986·Granted Sep 27, 1988·20 cites·2 claims
- 0382US5580980AN-aminopyridone dyesBASF AG·Filed 1992·Granted Dec 3, 1996·16 cites·5 claims
- 0481US6043369A[1,3,4] Triazolo [1,5-A] pyridinesBASF AG·Filed 1994·Granted Mar 28, 2000·21 cites·8 claims
- 0581US4994564AAzo dyes with a diazo component of the 3-amino thiophene series and a coupling component of the pyridine, pyridone or pyrazole seriesBASF AG·Filed 1988·Granted Feb 19, 1991·16 cites·4 claims
- 0679US5538939AAcylamino-substituted isoxazole or isothiazole derivatives, their preparation and their useBASF AG·Filed 1994·Granted Jul 23, 1996·26 cites·10 claims
- 0779US5079365ATriazolopyridine dyes and thermal transfer of methine dyesBASF AG·Filed 1990·Granted Jan 7, 1992·39 cites·4 claims
- 0879US4619992A3-(β-aminoethyl)-4-cyano-isothiazolylazo dyesBASF AG·Filed 1985·Granted Oct 28, 1986·14 cites·4 claims
- 0978US3963747ABasic arylmercaptonaphtholactam dyesBASF AG·Filed 1974·Granted Jun 15, 1976·9 cites·5 claims
- 1076US5101028A(1,2,4)triazolo[2,3-a]pyridinesBASF AG·Filed 1990·Granted Mar 31, 1992·17 cites·2 claims
- 1175US5283326ADyes containing thiophene radicalsSANDOZ AG·Filed 1992·Granted Feb 1, 1994·14 cites·14 claims
- 1275US4764600AIsothiazolylazo dyes having aminophenyl and aminonaphthyl componentsBASF AG·Filed 1983·Granted Aug 16, 1988·8 cites·1 claims
- 1373US4315855AMonoazo disperse dyes containing a nitrophenyl group and a homophthalimide groupBASF AG·Filed 1976·Granted Feb 16, 1982·8 cites·1 claims
- 1470US5608041AAzo dyestuffs containing a diazo component from the aniline series and coupling component from the triazolopyridine seriesBASF AG·Filed 1994·Granted Mar 4, 1997·10 cites·7 claims
- 1570US5147845ATriazolopyridine dyes and thermal transfer of methine dyesBASF AG·Filed 1991·Granted Sep 15, 1992·13 cites·2 claims
- 1669US4525591A2,4-Dioxotetrahydropyrimido-(1,2-a)-benzimidazole substituted isoindoline dyes and their useBASF AG·Filed 1983·Granted Jun 25, 1985·8 cites·9 claims
- 1767US4837269A2-aminothiophene radical substituted by an electron withdrawing groupBASF AG·Filed 1987·Granted Jun 6, 1989·8 cites·24 claims
- 1865US5206375AThiophene derivativesBASF AG·Filed 1992·Granted Apr 27, 1993·7 cites·3 claims
- 1965US5132412AThiazoleazo dyes having a diazo component from the isothiazole or thiadiazole seriesBASF AG·Filed 1989·Granted Jul 21, 1992·7 cites·4 claims
- 2061US4009165ANaphtholactam dyesBASF AG·Filed 1975·Granted Feb 22, 1977·5 cites·5 claims
- 2160US5612465APhenylazotriazolopyridine dyestuffsBASF AG·Filed 1994·Granted Mar 18, 1997·6 cites·5 claims
- 2258US4496480AIsothiazolazo dyes having coupling components which are free from unsaturated aliphatic radicalsBASF AG·Filed 1983·Granted Jan 29, 1985·5 cites·9 claims
- 2357US4960874AIsothiazolylazo dyes having aminophenyl and aminonaphthyl componentsBASF AG·Filed 1988·Granted Oct 2, 1990·5 cites·5 claims
- 2456US5352774ADyes containing thiophene radicalsSANDOZ AG·Filed 1993·Granted Oct 4, 1994·5 cites·17 claims
- 2556US4876356ANaphtholactam dyes and optical recording medium containing these daysBASF AG·Filed 1987·Granted Oct 24, 1989·9 cites·3 claims
- 2654US5703238APreparation of pyridine dyesBASF AG·Filed 1995·Granted Dec 30, 1997·6 cites·11 claims
- 2753US5654122AN-aminopyridone dyesBASF AG·Filed 1995·Granted Aug 5, 1997·9 cites·9 claims
- 2853US5491232ASulfur compounds useful for preparation of dyesBASF AG·Filed 1995·Granted Feb 13, 1996·4 cites·4 claims
- 2953US3946017ALactones of the benzaxanthere series and dye-forming components for use in duplication processesBASF AG·Filed 1974·Granted Mar 23, 1976·3 cites·6 claims
- 3051US4960873A3-pyridylisothiazoleazo compounds useful as disperse dyesBASF AG·Filed 1989·Granted Oct 2, 1990·4 cites·4 claims
- 3147US5929245ANaphtholactam dyesBASF AG·Filed 1995·Granted Jul 27, 1999·4 cites·11 claims
- 3247US4929720AIsothiazoleazo hydroxypyridone dyesBASF AG·Filed 1988·Granted May 29, 1990·3 cites·4 claims
- 3346US5270456AAzo dyes with A2-aminothiophene dye azo component and a coupling component and coupling component of the diphenylamine seriesBASF AG·Filed 1991·Granted Dec 14, 1993·3 cites·4 claims
- 3444US4096145ANaphtholactam derivativesBASF AG·Filed 1977·Granted Jun 20, 1978·2 cites·13 claims
- 3543US5637702ASulfur compoundsBASF AG·Filed 1996·Granted Jun 10, 1997·2 cites·4 claims
- 3643US5047570APreparation of 2-cyano-3-aminoacrylonitrile derivativesBASF AG·Filed 1989·Granted Sep 10, 1991·2 cites·4 claims
- 3743US4352932AIsoindoline colorantsBASF AG·Filed 1981·Granted Oct 5, 1982·2 cites·5 claims
- 3842US3950340AQuinazoline dyesBASF AG·Filed 1973·Granted Apr 13, 1976·2 cites·3 claims
- 3941US4062845ANaphtholactam dyesBASF AG·Filed 1976·Granted Dec 13, 1977·2 cites·8 claims
- 4040US4908041ANavy and black dye mixtures: thiophene azo disperse dye and red, yellow or orange disperse dyeBASF AG·Filed 1988·Granted Mar 13, 1990·7 cites·4 claims
- 4140US4904777AMono azo dyes containing as diazo radical a thiophene radical which possesses an oxime groupBASF AG·Filed 1987·Granted Feb 27, 1990·2 cites·2 claims
- 4240US4667051APreparation of cyano-substituted enol ethersBASF AG·Filed 1986·Granted May 19, 1987·1 cites·6 claims
- 4340US4611064APreparation of indole derivativesBASF AG·Filed 1985·Granted Sep 9, 1986·1 cites·3 claims
- 4439US5466812APreparation of N-aminopyridonesBASF AG·Filed 1994·Granted Nov 14, 1995·1 cites·2 claims
- 4539US4001335AProduction of 3-monochloro-2,4,5-trialkylbenzophenones and 3,6-dichloro-2,4,5-trialkylbenzophenonesBASF AG·Filed 1973·Granted Jan 4, 1977·1 cites·8 claims
- 4635US5062861ANovel navy and black disperse dye mixtures including amino-phenyl thiophene azo disperse dye and red, yellow or orange disperse dyesBASF AG·Filed 1990·Granted Nov 5, 1991·4 cites·3 claims
- 4733US5616710ATriazolopyridine dyesBASF AG·Filed 1995·Granted Apr 1, 1997·1 cites·6 claims
- 4833US5212309A3-aminobenzene-1,2,4,5-tetracarboxylic dihydrazides and composition capable of chemiluminescence, and 3-aminobenzene-1,2,4,5-tetracarboxylic dianhydridesBASF AG·Filed 1992·Granted May 18, 1993·0 cites·3 claims
- 4932US5145952AThiopheneazo dyes with a coupling component based on m-phenylenediamineBASF AG·Filed 1989·Granted Sep 8, 1992·0 cites·2 claims
- 5030US3997541ALactones of the benzazaxanthene series and dye-forming components for duplication processesBASF AG·Filed 1974·Granted Dec 14, 1976·1 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →