Helmut Heitzer
19Patents
6h-index
24Co-inventors
66Inventor score
Filing activity: Oct 28, 1975 → Nov 27, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4748243A | Preparation of 2-chloro-5-chloromethylthiazole | Chemistry; Metallurgy | 17 | Expired |
| US4179277A | 4,5-Dichloroimidazole-2-carboxylic acid derivatives | Chemistry; Metallurgy | 14 | Expired |
| US5708180A | Process for the preparation of 2-halogenopyridinealdehydes and novel 2-halogenopyridinealdehydes | Chemistry; Metallurgy | 13 | Expired |
| US5221681A | Substituted benzoxazepines and benzothiazepines | Chemistry; Metallurgy | 10 | Expired |
| US4187306A | Benzodiazepine-diones, a process for their production and their use as medicaments | Chemistry; Metallurgy | 9 | Expired |
| US4369186A | 4,5-Dichloroimidazole-2-carboxylic acid derivatives | Chemistry; Metallurgy | 8 | Expired |
| US4140857A | Process for the preparation of 2,4,5-trichloropyrimidine | Chemistry; Metallurgy | 3 | Expired |
| US5175336A | Fluoromethylated polycyanobenzenes, their alkali metal cyanide adducts, processes for their preparation and use of the fluoromethylated polycyanobenzenes | Physics | 1 | Expired |
| US4171442A | Process for the preparation of 2,4,5-trichloropyrimidine | Chemistry; Metallurgy | 1 | Expired |
| US4350520A | Plant growth regulant compositions | Chemistry; Metallurgy | 1 | Expired |
| US4293331A | Novel acyloxamides and plant growth regulant compositions | Human Necessities | 1 | Expired |
| US4125723A | Process for the preparation of tetrachloropyrimidine | Chemistry; Metallurgy | 1 | Expired |
| US4013674A | N-(1,2,2,2-tetrachloroethyl)-formimide-chloride for synthesizing trichlorothiazole | Chemistry; Metallurgy | 1 | Expired |
| US3994913A | 2,5-Dichloro-thiazolo[4,5-d]thiazole and process for making same | Chemistry; Metallurgy | 0 | Expired |
| US4067721A | Imidazolidinedione compounds and plant growth influencing compositions | Chemistry; Metallurgy | 0 | Expired |
| US4125722A | Process for the preparation of tetrachloropyrimidine | Chemistry; Metallurgy | 0 | Expired |
| US5258394A | 1-trifluoromethyl-1-nitro-2-alkoxy-2-aryl-ethanes, their preparation and antimycotic agents containing them | Chemistry; Metallurgy | 0 | Expired |
| US5066681A | 1-trifluoromethyl-1-nitro-2-alkoxy-2-aryl-ethanes, their preparation and antimycotic agents containing them | Chemistry; Metallurgy | 0 | Expired |
| US4021443A | Perchlorodiazafulvene | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.