John S. Ng
44Patents
6h-index
61Co-inventors
68Inventor score
Filing activity: Oct 3, 1988 → Nov 20, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5648511A | Method for making intermediates useful in the synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 19 | Expired |
| US5831117A | Method of preparing retroviral protease inhibitor intermediates | Chemistry; Metallurgy | 11 | Expired |
| US5981744A | Processes for preparation of 9,11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 11 | Expired |
| US5106750A | Enantio- and regioselective synthesis of organic compounds using enol esters as irreversible transacylation reagents | Chemistry; Metallurgy | 9 | Expired |
| US5583238A | Method for making intermediates useful in synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 9 | Expired |
| US4910310A | Synthesis of N-substituted 1,5-dideoxy-1,5-imino-L-fucitol derivatives | Chemistry; Metallurgy | 9 | Expired |
| US6610844B2 | Processes for preparation of 9,11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 4 | Expired |
| US6180780A | Processes for preparation of 9,11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 4 | Expired |
| US6214609A | Method and apparatus for preparation of chiral beta amino acids using penicilln G acylase | Chemistry; Metallurgy | 3 | Expired |
| US5055604A | Process for preparing prostaglandin analogs using organozirconium compounds | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6277626A | Process for the enzymatic resolution of lactams | Chemistry; Metallurgy | 3 | Expired |
| US6887991B1 | Processes for preparation of 9, 11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 3 | Expired |
| US5011958A | Process for preparing higher order cuprate complexes | Chemistry; Metallurgy | 3 | Expired |
| US7129345B2 | Keto-substituted steroid compounds | Chemistry; Metallurgy | 3 | Expired |
| US5872298A | Method of preparing intermediates for retroviral protease inhibitors | Chemistry; Metallurgy | 2 | Expired |
| US6022996A | Method for making intermediates useful in synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 2 | Expired |
| US6127556A | Epoxide formation by continuous in-situ synthesis process | Chemistry; Metallurgy | 2 | Expired |
| US5872299A | Method of preparing intermediates for retroviral protease inhibitors | Chemistry; Metallurgy | 2 | Expired |
| US6974876B2 | Method for preparing intermediates useful in synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 2 | Expired |
| US5252763A | Process for preparing prostaglandin analogs | Chemistry; Metallurgy | 2 | Expired |
| US6201150A | Method of preparing retroviral protease inhibitor intermediates | Chemistry; Metallurgy | 1 | Expired |
| US6388094B1 | Method for making intermediates useful in synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 1 | Expired |
| US6630587B2 | Processes for preparation of 9,11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 1 | Expired |
| US6570027B2 | Method of preparing intermediates useful in synthesis of retroviral protease inhibitors | Chemistry; Metallurgy | 1 | Expired |
| US6331622A | Processes for preparation of 9, 11-epoxy steroids and intermediates useful therein | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.