Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5824801 | Process for sterospecific synthesis of keto-enol tautomeric mixture of p nitrobenzyl (1R, 6R, 7R)-7-phenoxyacetamido-3-oxo-3-cepham-4-(R/S)-carboxylate-1-oxide and p-nitrobenzyl (1R, 6R, 7R)-7-phenoxyacteamido-3-hydroxy-3-cephem-4-carboxylate-1-oxide | Ramanathan Sankaran, Sugata Chattejee, Tumma Hari Krishna | 1998-10-20 |
| 5750683 | Process for the stereospecific synthesis of keto-enol tautomeric mixture of p-nitrobenzyl (1R,6R,7R)-7-phenoxyactamido-3-oxo-cepham-4-(R/S)-carboxylate-1-oxide and p-nitrobenzyl (1R,6R,7R)-7-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate-1-oxide | Ramanathan Sankaran, Sugata Chattejee, Tumma Hari Krishna | 1998-05-12 |
| 5604222 | Method for the preparation of 2-chloro sulfinyl azetidinones | Ramanathan Sankaran, Sakina Sitabkhan | 1997-02-18 |
| 5578721 | Process for preparation of 3-exomethylene cepham sulfoxide esters | Ramanathan Sankaran, Shibu B. Varughese, Sakina Sitabkhan | 1996-11-26 |