US3897422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
{8 (Azidomethyl)thio{9 acetylcephalosporins
Assignee: ER Squibb and Sons LLC
•
Filing: 1973-03-05
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Granted: 1975-07-29
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Expires: 1993-03-05
Abstract
Abstract New ((azidomethyl)thio)acetylcephalosporins of the following general formula, and their salts, WHEREIN R is hydrogen, lower alkyl, aralkyl, tri(lower alkyl)silyl, a salt forming ion or the group R1 is hydrogen or lower alkyl; R2 is hydrogen, lower alkyl, aryl or a heterocyclic group; R3 is lower alkyl, aryl or aralkyl; and X is hydrogen, hydroxy, lower alkanoyloxy, lower alkoxy, lower alkylthio, lower alkylthiazolylthio, azido, the radical of a nitrogen base, or together X and R represent a bond linking carbon and oxygen in a lactone ring; are useful as antibacterial agents.
Inventors
- 👤 Hermann Breuer
- 👤 Uwe D Treuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:24
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FROMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FROMULA
Claim 3
Dependent Claim
5 words
A compound of the formula
Claim 4
Dependent Claim
5 words
A compound of the formula
Claim 5
Dependent Claim
29 words
A compound as in claim 2 wherein R is hydrogen or alkali metal, R1 and R2 each is hydrogen or lower alkyl, and X is hydrogen or lower alkanoyloxy.
Claim 6
Dependent Claim
13 words
A compound as in claim 2 wherein R1 and R2 each is hydrogen.
Claim 7
Dependent Claim
21 words
A compound as in claim 4 wherein R is hydrogen Or alkali metal and X is hydrogen, acetoxy, methoxy or methylthio.
Claim 8
Dependent Claim
15 words
A compound as in claim 2 wherein R, R1, R2 and X each is hydrogen.
Claim 9
Dependent Claim
9 words
Alkali metal salt of the compound of claim 6.
Claim 10
Dependent Claim
18 words
A compound as in claim 2 wherein R, R1 and R2 each is hydrogen and X is acetoxy.
Claim 11
Dependent Claim
9 words
Alkali metal salt of the compound of claim 8.
References Cited (Backward Citations)
US3647788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |