US3833568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic ureidocephalosporins
Assignee: ER Squibb and Sons LLC
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Filing: 1970-11-27
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Granted: 1974-09-03
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Expires: 1990-11-27
Abstract
Abstract COMPOUNDS OF THE FORMULA R-(CH2)N-CH(-CO-Z)-NH-CO-NH2 WHEREIN R IS A FURYL, PYRIDYL, PYRRYL, OR THIENYL RADICAL, OR A SUBSTITUTED DERIVATIVE THEREOF; N IS 0, 1 OR 2; AND Z IS THE RESIDUE OF THE 7-ACA OR OF THE 7-ADCA MOIETY, ARE EFFECTTIVE ANTIBACTERIAL AGENTS.
Inventors
- 👤 J Dolfini
- 👤 J Bernstein
- 👤 R Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20
Claims Analysis
Total Claims: 0
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |