Ta-Sen Chou
34Patents
13h-index
14Co-inventors
78Inventor score
Filing activity: Apr 12, 1973 → Mar 19, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5606048A | Stereoselective glycosylation process for preparing 2'-Deoxy-2', 2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides | Emerging Cross-Sectional Technologies | 77 | Expired |
| US5401838A | Stereoselective fusion glycosylation process for preparing 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides | Chemistry; Metallurgy | 57 | Expired |
| US4965374A | Process for and intermediates of 2',2'-difluoronucleosides | Chemistry; Metallurgy | 50 | Expired |
| US5371210A | Stereoselective fusion glycosylation process for preparing 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides | Chemistry; Metallurgy | 44 | Expired |
| US5821357A | Stereoselective glycosylation process for preparing 2'-deoxy-2',2'-difluoropurine and triazole nucleosides | Chemistry; Metallurgy | 39 | Expired |
| US5256798A | Process for preparing alpha-anomer enriched 2-deoxy-2,2-difluoro-D-ribofuranosyl sulfonates | Chemistry; Metallurgy | 37 | Expired |
| US5453499A | Process for preparing alpha-anomer enriched 1-halo-2-deoxy-2,2-difluoro-D-ribofuranosyl derivatives | Chemistry; Metallurgy | 37 | Expired |
| US5223608A | Process for and intermediates of 2',2'-difluoronucleosides | Chemistry; Metallurgy | 35 | Expired |
| US5401861A | Low temperature process for preparing alpha-anomer enriched 2-deoxy-2,2-difluoro-D-ribofuranosyl sulfonates | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5256797A | Process for separating 2-deoxy-2,2-difluoro-D-ribofuranosyl alkylsulfonate anomers | Chemistry; Metallurgy | 21 | Expired |
| US5594124A | Stereoselective glycosylation process for preparing 2'-Deoxy-2',2'-difluoropyrimidine nucleosides and 2'-deoxy-2'-fluoropyrimidine nucleosides and intermediates thereof | Chemistry; Metallurgy | 20 | Expired |
| US5945547A | Imtermediate in process to make 2', 2'-difluoronucleosides | Chemistry; Metallurgy | 18 | Expired |
| US5434254A | Process for preparing 2',2'-difluoronucleosides | Chemistry; Metallurgy | 13 | Expired |
| US5744597A | Stereoselective anion glycosylation process for preparing 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides | Chemistry; Metallurgy | 10 | Expired |
| US4289695A | Process for preparing 2-chlorosulfinylazetidinones | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4075203A | Process for preparing a 3-exomethylenecepham sulfoxide from penicillin sulfoxides | Chemistry; Metallurgy | 9 | Expired |
| US3944545A | Process for preparing desacetoxycephalosporins | Chemistry; Metallurgy | 8 | Expired |
| US4190724A | Process for 3-exomethylenecepham sulfoxides | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5648473A | 2'-deoxy-2', 2'-difluoropyrimidine nucleosides and 2'-deoxy-2'-fluoropyrimidine nucleosides and intermediates | Chemistry; Metallurgy | 6 | Expired |
| US4537959A | Crystalline cephalosporin antibiotic salt | Human Necessities | 5 | Expired |
| US4165316A | Process for preparing sulfinyl chlorides from penicillin sulfoxides | Chemistry; Metallurgy | 4 | Expired |
| US4616080A | Simplified process of forming crystalline ceftazidime pentahydrate | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4230620A | Process for preparing penicillin sulfoxides | Chemistry; Metallurgy | 3 | Expired |
| US4212977A | Process for preparing N-chloroimides | Chemistry; Metallurgy | 3 | Expired |
| US5252756A | Process for preparing beta-anomer enriched 2-deoxy-2,2-difluoro-D-ribofuranosyl-arylsulfonates | Chemistry; Metallurgy | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.