Walter Durckheimer
36Patents
12h-index
38Co-inventors
81Inventor score
Filing activity: Jul 22, 1974 → Jul 22, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4278793A | Cephem derivative | Chemistry; Metallurgy | 162 | Expired |
| US4647556A | Cephalosporin derivatives | Human Necessities | 35 | Expired |
| US5071979A | Cephalosporin derivatives | Human Necessities | 29 | Expired |
| US4399131A | Cephem derivatives | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4667028A | Process for the preparation of cephem compounds | Chemistry; Metallurgy | 26 | Expired |
| US5362721A | Corticoid-17-alkyl-carbonates substituted in the 17-position, process for their preparation and pharmaceuticals containing them | Chemistry; Metallurgy | 24 | Expired |
| US3983173A | 2-Carboxamido-substituted tetracyclines and process for their manufacture | Chemistry; Metallurgy | 18 | Expired |
| US4593027A | 3-aryl-7-chloro-3,4-dihydroacridine-1,9(2H,10H)-dione 1-oximes and 1-hydrazone derivatives, their salts, a process for their preparation, agents containing them and their use | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4758556A | Cephem derivatives | Chemistry; Metallurgy | 17 | Expired |
| US5565423A | Cyclopeptides and their use as absorption promoters when applied to the mucosa | Emerging Cross-Sectional Technologies | 15 | Expired |
| US3947449A | Tetrahydroacridones having chemotherapeutic action and process for preparing them | Chemistry; Metallurgy | 13 | Expired |
| US4603129A | Cephalosporin derivatives | Human Necessities | 12 | Expired |
| US4284627A | Antimalarial compositions | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5100887A | Cephalosporin derivatives | Chemistry; Metallurgy | 10 | Expired |
| US3993694A | Tetracycline derivatives and process for preparing them | Chemistry; Metallurgy | 8 | Expired |
| US4293550A | Cephalosporin derivatives | Chemistry; Metallurgy | 8 | Expired |
| US4845087A | Crystallized cephem-acid addition salts, and a process for the preparation thereof | Human Necessities | 7 | Expired |
| US5089490A | Cephem derivatives | Chemistry; Metallurgy | 7 | Expired |
| US4260615A | Antimalarial compositions | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4282220A | Cephem derivatives | Chemistry; Metallurgy | 6 | Expired |
| US4609653A | Crystalline cephem-acid addition salts and processes for their preparation | Human Necessities | 6 | Expired |
| US4762848A | 1,3-thiazoles and their use as immunomodulators | Chemistry; Metallurgy | 5 | Expired |
| US4624948A | Crystalline modification of ceftazidim | Human Necessities | 4 | Expired |
| US5409918A | Crystalline cephem acid addition salts and process for their preparation | Human Necessities | 4 | Expired |
| US6835724B2 | Corticoid 17,21-dicarboxylic esters and corticosteroid 17-carboxylic ester 21-carbonic esters, processes for their preparation and pharmaceuticals containing these compounds | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.