Philip D. Hammen
12Patents
5h-index
16Co-inventors
63Inventor score
Filing activity: Dec 6, 1972 → Apr 25, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5081118A | Benzothiazine dioxide derivatives | Human Necessities | 9 | Expired |
| US4100347A | 3,4-Dihydro-2-methyl-4-oxo-2H-1,2-benzothiazine-3-carboxylic acid-1,1-dioxide | Chemistry; Metallurgy | 8 | Expired |
| US4431828A | Regeneration of 6-fluoro-4-chromanone from by-products in the synthesis of sorbinil | Chemistry; Metallurgy | 6 | Expired |
| US6825327B2 | Process for preparing 4″-substituted-9-deoxo-9a-aza-9a-homoerythromycin a derivatives | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4062844A | Process for preparing hypotensive 2-(4-aroylpiperazin-1-yl)-amino-6,7-dimethoxyquinazolines | Chemistry; Metallurgy | 5 | Expired |
| US4022836A | 2-Aminomethyleneindanone analgesic agents | Chemistry; Metallurgy | 4 | Expired |
| US4117012A | 2-Aminomethyleneindanone analgesic agents | General | 1 | Expired |
| US4164514A | 2-Aminomethyleneindanone analgesic agents | General | 1 | Expired |
| US4064272A | 2-Aminomethyleneindanone analgesic agents | Chemistry; Metallurgy | 1 | Expired |
| US6410750B1 | Processes and intermediates for preparing 3(S)-[(5-chloro-1H-indole-2-carbonyl)-amino]-2(R)-hydroxy-4-phenyl-butyric acid | Chemistry; Metallurgy | 0 | Expired |
| US6013808A | Method of purifying carbazole ester precursors of 6-chloro-.alpha.-methyl-carbazole-2-acetic acid | Chemistry; Metallurgy | 0 | Expired |
| US3950350A | Penam-dimethylsulfoxide complex | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.