Patent US3770722A successfully refreshed from Google Patents.
US3770722A
Expired / Lapsed
US
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6 - (alpha - (aryl substituted)acylamino-acylamino)penicillanic acidsand derivatives thereof
Assignee: Pfizer Inc
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Filing: 1971-10-04
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Granted: 1973-11-06
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Expires: 1991-10-04
Abstract
Abstract A NOVEL SERIES OF ANTIBACTERIAL AGENTS; NAMELY, 6-(A(ARYL SUBSTITUTED)ACYLAMINOACYLAMINO)PENICILLANIC ACIDS OF THE FORMULA 6-(Z-NH-CH2-CO-NH-),2-(HOOC-),3,3-DI(CH3-)PENAM THE NON-TOXIC SALTS, ESTERS AND AMIDES THEREOF WHEREIN Z IS RR1CH-CO-; R IS PHENYL, SUBSTITUTED PHENYL OR THIENYL; R1 IS HYDROGEN OR COOH; AND INTERMEDIATES THEREFOR OF THE ABOVE FORMULA WHEREIN Z IS HYDROGEN.
Inventors
- 👤 G Bright
- 👤 E Hamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:05
CPC Classifications
C; C07; C07D; C07D499/00
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |