Winfried Seidel
6Patents
3h-index
4Co-inventors
42Inventor score
Filing activity: Jan 19, 1984 → Sep 30, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5230710A | Substituted 2,6-diaminotoluenes, processes for their preparation and coloring agents for keratinic fibers comprising these compounds | Chemistry; Metallurgy | 5 | Expired |
| US4575378A | Substituted 4-amino-3-nitrophenols, processes for their preparation and hair-coloring agents containing these compounds | Human Necessities | 4 | Expired |
| US5091581A | Process for the selective preparation of N-substituted 1,4-diamino-2-nitrobenzenes | Chemistry; Metallurgy | 3 | Expired |
| US5067967A | Nitro-p-phenylenediamine derivatives, processes for their preparation and coloring agents containing these for use on keratin fibres | Chemistry; Metallurgy | 2 | Expired |
| US4857070A | 2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their preparation and tinting compositions, which contain them for keratinic fibres | Chemistry; Metallurgy | 2 | Expired |
| US5163970A | Nitro-p-phenylenediamine derivatives, processes for their preparation and coloring agents containing these for use on keratin fibres | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.