US3673183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
{60 -ureidocephalosporanic acid compounds
Assignee: ER Squibb and Sons LLC
•
Filing: 1969-11-17
•
Granted: 1972-06-27
•
Expires: 1989-11-17
Abstract
Abstract New Alpha -ureidocephalosporanic acid compounds of the general formula ARE EFFECTIVE AS ANTIBACTERIAL AGENTS AND SHOW IMPROVED RESULTS AGAINST CERTAIN HARD TO CONTROL ORGANISMS.
Inventors
- 👤 Raymond Curry Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:31
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A compound of the formula
Claim 2
Dependent Claim
5 words
A compound of the formula
Claim 3
Dependent Claim
20 words
A compound as in claim 2 wherein R1 and R2 each is hydrogen, X is acetoxy and n is 0.
Claim 4
Dependent Claim
18 words
A compound as in claim 2 wherein R1, R2 and X each is hydrogen and n is 0.
Claim 5
Dependent Claim
20 words
A compound as in claim 3 wherein R1 and R3 each is hydrogen, X is acetoxy and n is 0.
Claim 6
Dependent Claim
18 words
A compound as in claim 3 wherein R1, R3 and X each is hydrogen and n is 0.
References Cited (Backward Citations)
US3466275A
Cited
US3352851A
Cited
US3487079A
Cited
US3457257A
Cited
US3485819A
Cited
US3497504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |