Helmut Troster
22Patents
7h-index
14Co-inventors
66Inventor score
Filing activity: Jan 16, 1974 → Dec 15, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4709029A | Process for the preparation of perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides | Chemistry; Metallurgy | 24 | Expired |
| US4501906A | Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid monoanhydride and process for their manufacturing | Chemistry; Metallurgy | 17 | Expired |
| US4116923A | Dyed polyesters, process for their preparation and their use for the dyeing of plastics | Chemistry; Metallurgy | 14 | Expired |
| US4599408A | Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides | Chemistry; Metallurgy | 13 | Expired |
| US4831140A | Process for the preparation of arylimides of perylene-3,4,9,10-tetracarboxylic acid | Chemistry; Metallurgy | 11 | Expired |
| US5154770A | Mix-crystal pigments based on perylenetetracarbimides, process for their preparation and their use | Chemistry; Metallurgy | 8 | Expired |
| US4769460A | Mix-crystal pigments based on perylenetetracarbimides, process for preparing and their use | Chemistry; Metallurgy | 7 | Expired |
| US4594420A | Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimide and monoimidazolide compounds, processes for their preparation and their use | Chemistry; Metallurgy | 7 | Expired |
| US5319083A | Black peryene-3,4,9,10-tetracarboxylic diimides, their preparation and use | Chemistry; Metallurgy | 7 | Expired |
| US4742170A | Mix-crystal pigments based on perylenetetracarbimides, process for their preparation, and their use | Chemistry; Metallurgy | 5 | Expired |
| US4242139A | Water soluble benzoxanthene dyestuffs for fluorescent inks | Emerging Cross-Sectional Technologies | 5 | Expired |
| US3939093A | Daylight fluorescent pigments | Chemistry; Metallurgy | 5 | Expired |
| US4097450A | Perinone compounds as colorants for polyolefins | Chemistry; Metallurgy | 4 | Expired |
| US4002630A | Novel aromatic o-hydroxyaldehydes, a process for their preparation and their utilization | Chemistry; Metallurgy | 3 | Expired |
| US3954810A | Process for the preparation of 4-bromonaphthalic acid anhydride | Chemistry; Metallurgy | 2 | Expired |
| US6563112B1 | Method for enhancing the contrast for a transmission electron microscope | Physics | 1 | Expired |
| US3947450A | Benzoxanthene and benzothioxanthene dicarboxylic acid imide dyestuffs and process for their manufacture | Chemistry; Metallurgy | 1 | Expired |
| US4786575A | Pigment for electrophotographic recording processes | Physics | 1 | Expired |
| US6521604B1 | Compounds containing boron for energy-filtering transmission electron microscopy and for boron neutron-capture therapy | Human Necessities | 0 | Expired |
| US4082769A | Benzothioxanthenes | Textiles; Paper | 0 | Expired |
| US4007180A | Perinone dyestuffs | Chemistry; Metallurgy | 0 | Expired |
| US4046501A | Process for the dyeing and printing of synthetic polyamides | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.