Phaik-Eng Sum
51Patents
24h-index
51Co-inventors
91Inventor score
Filing activity: Jan 10, 1983 → May 14, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5494903A | 7-substituted-9-substituted amino-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 73 | Expired |
| US5284963A | Method of producing 7-(substituted)-9-[(substituted glycyl)-amidol]-6-demethyl-6-deoxytetra-cyclines | Chemistry; Metallurgy | 66 | Expired |
| US5529990A | Method for treating bacterial infection with novel 7-substituted-9-substituted amino 6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 62 | Expired |
| US5328902A | 7-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 62 | Expired |
| US5401729A | 7-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 61 | Expired |
| US5380888A | 7-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 59 | Expired |
| US5495031A | Process for the production of 7-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 55 | Expired |
| US5386041A | 7-(substituted)-8-(substituted)-9-[(substituted glycyl) amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 53 | Expired |
| US5430162A | 7-(substituted)-8-(substituted)-9-substituted amino)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 51 | Expired |
| US5466684A | 7-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 50 | Expired |
| US5281628A | 9-amino-7-(substituted)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 50 | Expired |
| US5248797A | Method for the production of 9-amino-6-demethyl-6-deoxytetracycline | Chemistry; Metallurgy | 48 | Expired |
| US5530117A | 7-substituted-9-substituted amino-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 47 | Expired |
| US5420272A | 7-(substituted)-8-(substituted)-9-](substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 42 | Expired |
| US5442059A | 9-[(substituted glycyl)amido)]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 42 | Expired |
| US5574026A | Methods for inhibiting angiogenesis proliferation of endothelial or tumor cells and tumor growth | Human Necessities | 42 | Expired |
| US5401863A | 9-amino-7-(substituted)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 41 | Expired |
| US5495018A | 7-(substituted-9-(substituted amino)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 38 | Expired |
| US5886175A | 7-(substituted)-8-(substituted)-9-(substitued amino)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 38 | Expired |
| US5326759A | 9-amino-7-(substituted)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 35 | Expired |
| US5512553A | 7-(substituted)-8-(substituted)-9-(substituted amino)-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 35 | Expired |
| US5495030A | 9-[(substituted glycyl)amido)]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 34 | Expired |
| US5457096A | 7-(substituted)-8-(substituted)-9-[(substituted glycyl)amido]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 34 | Expired |
| US5567692A | 9-[(substituted glycyl) amido)]-6-demethyl-6-deoxytetracyclines | Chemistry; Metallurgy | 33 | Expired |
| US5567693A | Method for inhibiting angiogenesis, proliferation of endothelial or tumor cells and tumor growth | Human Necessities | 24 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.