US3865820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylamino-cephalosporanic acids
Assignee: Hoechst AG
•
Filing: 1972-04-14
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Granted: 1975-02-11
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Expires: 1992-04-14
Abstract
Abstract Acylaminocephalosporanic acids of the formula I wherein R1, R2 and R3 each represents hydrogen or lower alkyl radicals in which case R1 and R2 may also form together an optionally substituted alkylene radical, A represents an optionally substituted phenylene or thienyl radical, and X represents an oxygen atom or a single bond, the physiologically tolerable salts thereof, pharmaceutical preparations effective against bacterial infections containing these compounds, and a process for the manufacture.
Inventors
- 👤 Manfred Schorr
- 👤 Elmar Schrinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/26; C07D501/32; C07D499/00; C07D501/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
6 words
AN ACYLAMINOCEPHALOSPORANIC ACID OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN ACYLAMINOCEPHALOSPORANIC ACID OF THE FORMULA
Claim 3
Dependent Claim
25 words
A compound as claimed in claim 1, wherein R1, R2 and R3 each stand for hydrogen, A represents p-phenylene and X is a single bond.
Claim 4
Dependent Claim
23 words
A compound as claimed in claim 1, wherein R1, R2 and R3 each stand for hydrogen, A represents p-phenylene and X is oxygen.
Claim 5
Dependent Claim
37 words
A compound as claimed in claim 1, wherein R1, R2 and R3 each stand for hydrogen, A repreSents 2-thienyl, and amidino radical being linked in the 5-position of the thienyl radical, and X is a single bond.
Claim 6
Dependent Claim
27 words
A compound as claimed in claim 1, wherein R1 and R2 together stand for n-propylene, R3 is methyl, A represents p-phenylene and X is a single bond.
Claim 7
Dependent Claim
14 words
A compound as claimed in claim 1, wherein R1 and R2 together stand for
Claim 8
Dependent Claim
14 words
A compound as claimed in claim 1, wherein R1 and R2 together stand for
Claim 9
Dependent Claim
25 words
A compound as claimed in claim 1, wherein R1 and R2 together stand for ethylene, R3 is hydrogen, A represents p-phenylene and X is oxygen.
References Cited (Backward Citations)
US3484437A
Cited
US3457257A
Cited
US3575969A
Cited
US3708477A
Cited
US3632578A
Cited
US3579506A
Cited
US3749711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |