1,3-dithietane-2-carboxylic acid penicillin and cephalosporin derivatives
USRE33778E · kind E · reissue
15Cited by
3References
7Claims
0Family size
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Key dates
| Filing date | Dec 8, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Dec 8, 2009 |
Classification
- Technology area (CPC —)General
Abstract
Substituted 1,3-dithietane-2-carboxylic acid derivatives useful as intermediates for the preparation of highly effective penicillin and cephalosporin derivatives and the preparation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.