Heinz Eilingsfeld
40Patents
7h-index
47Co-inventors
65Inventor score
Filing activity: Aug 29, 1973 → Apr 8, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4843153A | Azo dyes containing thienothiophene radicals as radicals of the diazo component | Chemistry; Metallurgy | 26 | Expired |
| US4465857A | Phenylhydrazones | Physics | 12 | Expired |
| US4207233A | Azo dyes containing a thiazole component | Chemistry; Metallurgy | 11 | Expired |
| US4533612A | Electrophotographic recording materials containing special charge carrier-transporting compounds | Chemistry; Metallurgy | 11 | Expired |
| US4983773A | Preparation of bis-(4-chlorophenyl) sulfone | Chemistry; Metallurgy | 10 | Expired |
| US4045456A | Manufacture of anthraquinones | Chemistry; Metallurgy | 9 | Expired |
| US4002653A | Manufacture of anthraquinone | Chemistry; Metallurgy | 9 | Expired |
| US3978096A | Production of 1-chloroanthraquinone | Chemistry; Metallurgy | 6 | Expired |
| US4456672A | Electrophotographic recording materials containing triazole charge carrier-transporting compounds | Physics | 6 | Expired |
| US4117019A | Manufacture of o-benzyltoluenes | Chemistry; Metallurgy | 5 | Expired |
| US4153607A | Process for the production of 4,5-disubstituted thiazoles | Chemistry; Metallurgy | 5 | Expired |
| US4466899A | Dyes for use in liquid crystal mixtures | Chemistry; Metallurgy | 5 | Expired |
| US4250090A | 2-Amino-5-arylazoarylazothiazole compounds | Chemistry; Metallurgy | 5 | Expired |
| US4481272A | Layered electrophotographic recording medium comprising heterocyclic nitrogen containing organic dye compounds | Physics | 5 | Expired |
| US5206375A | Thiophene derivatives | Chemistry; Metallurgy | 5 | Expired |
| US4198205A | Triazinyl-anthraquinone dye formulations for cellulose or cellulosic fibrous material | Textiles; Paper | 5 | Expired |
| US4897469A | Aniline series azo reactive dyes ortho- or para-substituted by vinyl sulfonyl reactive groups | Chemistry; Metallurgy | 4 | Expired |
| US3933917A | Production of dimethylbenzophenone | Chemistry; Metallurgy | 4 | Expired |
| US3978144A | Manufacture of o-benzyltoluenes | Chemistry; Metallurgy | 3 | Expired |
| US4042604A | Isolation of dinitroanthraquinone having a high content of .alpha.,.alpha.- d | Chemistry; Metallurgy | 3 | Expired |
| US4239894A | Thiazole derivatives | Chemistry; Metallurgy | 3 | Expired |
| US5082973A | Process for the preparation of bis(4-chlorophenyl) sulfone | Chemistry; Metallurgy | 3 | Expired |
| US4053488A | Separation of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone | Chemistry; Metallurgy | 3 | Expired |
| US4407810A | Thiazol-2-yl-oxamic acid derivatives, and therapeutic agents containing these compounds | Human Necessities | 3 | Expired |
| US4785116A | Aminoisothiazole compounds | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.