Patent US5240870A successfully refreshed from Google Patents.
Patent US3835130A successfully refreshed from Google Patents.
US3835130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-thia-cepham and cephem-4-carboxylic acids
Assignee: Novartis Corp
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Filing: 1971-10-29
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Granted: 1974-09-10
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Expires: 1991-10-29
Abstract
Abstract The invention concerns 7-amino-2-thiacepham-4-carboxylic acid and 7-amino-2-thiaceph-3-em-4-carboxylic acid compounds and their N-acyl derivatives. These compounds, particularly the latter ones have antibacterial properties. The invention also concerns process for the manufacture of such compounds and intermediates and starting materials useful in such process.
Inventors
- 👤 R Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:10
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/02; C07D501/08; C07D513/00; C07D513/02; C07D513/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
28 words
A compound as claimed in claim 1 and being a member selected from the group consisting of 7 Beta -(N-phenylacetylamino)-2-thiaceph-3-em-4-carboxylic acid and pharmaceutically acceptable carboxylic acid salts thereof.
Claim 2
Dependent Claim
28 words
A compound as claimed in claim 1 and being a member selected from the group consisting of 7 Beta -(N-cyanoacetylamino)-2-thiaceph-3-em-4-carboxylic acid and pharmaceutically acceptable carboxylic acid salts thereof.
Claim 3
Dependent Claim
28 words
A compound as claimed in claim 1 and being a member selected from the group consisting of 3-methyl-7 Beta -(N-phenylacetylamino)-2-thiaceph-3-em-4-carboxylic acid and pharmaceutically acceptable carboxylic acid salts thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |