Gregor Haffer
36Patents
4h-index
27Co-inventors
63Inventor score
Filing activity: Dec 22, 1972 → Jun 23, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4970314A | Process for the preparation of 2-bromo-8-ergolinyl compounds | Chemistry; Metallurgy | 15 | Expired |
| US4826852A | Novel ergolinyl compounds nitrogen-substituted in the 8-position, useful for treating dopamine deficiency | Chemistry; Metallurgy | 12 | Expired |
| US4748248A | Process for the preparation of ergoline derivatives | Chemistry; Metallurgy | 12 | Expired |
| US5569661A | Process for the production of b-carbolines | Human Necessities | 10 | Expired |
| US4644062A | Process for the production of .beta.-carbolines by dehydrogenation | Chemistry; Metallurgy | 4 | Expired |
| US4077996A | Process for the preparation of trans-deca hydronaphthalene derivatives | Chemistry; Metallurgy | 3 | Expired |
| US4017545A | Process for the preparation of bicycloalkane derivatives | Chemistry; Metallurgy | 3 | Expired |
| US4766128A | Optionally 11- to 13-substituted ergoline compounds useful as medicinal agents | Human Necessities | 3 | Expired |
| US3960842A | Process for the preparation of 17.beta.-oxalyl steroids | Chemistry; Metallurgy | 2 | Expired |
| US4333928A | 16 .alpha.-Alkyl steroids, their preparation, and pharmaceutical preparations thereof | Chemistry; Metallurgy | 2 | Expired |
| US4066674A | Process for the preparation of 1,3-oxygenated 8.alpha.-estratrienes and novel intermediates obtained therefrom | Chemistry; Metallurgy | 2 | Expired |
| US4968801A | Process for the production ergoline derivatives | Chemistry; Metallurgy | 2 | Expired |
| US4155923A | Process for the preparation of 17.beta.-hydroxy-20-alkoxypregnane-21-oic acid derivatives | Chemistry; Metallurgy | 2 | Expired |
| US4170518A | Microbiological conversion of sterol derivatives to 5-androsten-17-one derivatives and their use | Chemistry; Metallurgy | 2 | Expired |
| US4695635A | Process for the production of 2,3-dihydroergolines | Chemistry; Metallurgy | 2 | Expired |
| US5198553A | Process for the production of gramine derivatives | Chemistry; Metallurgy | 1 | Expired |
| US5371000A | Process for the production of ergoline derivatives | Emerging Cross-Sectional Technologies | 1 | Expired |
| US3965124A | 6,9-Oxido-9,10-secoestrane derivatives and method of synthesis | Chemistry; Metallurgy | 1 | Expired |
| US3998847A | 9,10-Secoestrane derivatives and their production | Chemistry; Metallurgy | 1 | Expired |
| US4178381A | C-homoestratrienes | Chemistry; Metallurgy | 1 | Expired |
| US4008253A | Bicycloalkanes | Chemistry; Metallurgy | 1 | Expired |
| US4072716A | Bicycloalkane derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4298538A | 16-Dimethylaminomethylene-3-methoxy-1,3,5-(10)-estratrien-17-one, a process for the preparation thereof and its use as a preparative intermediate | Chemistry; Metallurgy | 1 | Expired |
| US5401854A | Process for the production of indole derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4024166A | Process for the preparation of 13.beta.-alkyl-4-gonene-3,17-diones | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.