Isao Sugiyama
24Patents
4h-index
28Co-inventors
63Inventor score
Filing activity: Dec 19, 1980 → Nov 2, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4468394A | Cephalosporin compounds | Chemistry; Metallurgy | 15 | Expired |
| US5151417A | 3-substituted vinyl cephalosporin derivatives | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4748171A | Cephem compounds having at the 3-position a (1,4-methylene-1-piperidinio)methyl group or a (1-quinuclidinio)methyl group | Chemistry; Metallurgy | 11 | Expired |
| US4698336A | 3-(pyrrolidinio)methyl-3-cephem derivatives | Chemistry; Metallurgy | 5 | Expired |
| US5373000A | 7Beta-(thiadiazolyl)-2-iminoacetamido-3cephem compounds | Chemistry; Metallurgy | 4 | Expired |
| US5010188A | Cephem derivatives | Chemistry; Metallurgy | 3 | Expired |
| US4921850A | 3-propenylcephem derivative | Chemistry; Metallurgy | 3 | Expired |
| US6037341A | Carbapenem derivatives | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4929612A | Thiadiazolylacetamide cephem derivatives | Chemistry; Metallurgy | 2 | Expired |
| US5089491A | 3-propenylcephem derivative | Chemistry; Metallurgy | 2 | Expired |
| US5128465A | Process for the preparation of cephem derivatives and intermediates therefor | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4721788A | 4-cyanopiperidine derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4352801A | Cephem derivatives and antibacterial agents comprising said compounds | Human Necessities | 1 | Expired |
| US6218550A | Intermediates useful for the manufacture of carbapenem and a stereoselective manufacturing method therefor | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5559225A | 7-acyl-3-(substituted carbamoyloxy) cephem compound | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5008260A | Cephem derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4309354A | Chromone derivatives | Human Necessities | 1 | Expired |
| US4331606A | N-(Substituted chromone-3-carbonyl)-phenylglycine derivatives | Chemistry; Metallurgy | 1 | Expired |
| US5587473A | 7-acyl-3-(substituted carbamoyloxy) cephem compounds and process for their preparation | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6372914B1 | Intermediates useful for the manufacture of carbapenem and a stereoselective manufacturing method therefor | Emerging Cross-Sectional Technologies | 0 | Expired |
| US5006649A | 3-propenylcephem derivative | Chemistry; Metallurgy | 0 | Expired |
| US5563265A | 7-acyl-3-(substituted carbamoyloxy) cephem compounds | Emerging Cross-Sectional Technologies | 0 | Expired |
| US5604217A | 7-acyl-3-(substituted carbamoyloxy) cephem compounds and process for their preparation | Emerging Cross-Sectional Technologies | 0 | Expired |
| US5741902A | 7-acyl-3-(substituted carbamoyloxy) cephem compounds and process for their preparation | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.