US3838152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly alpha-amino penicillins
Assignee: Wyeth LLC
•
Filing: 1971-10-07
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Granted: 1974-09-24
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Expires: 1991-10-07
Abstract
Abstract HIGH MOLECULAR WEIGHT DIMERS, TRIMERS, TETRAMERS OF SEMI SYNTHETIC A-AMINO PENCILLINS ARE DESCRIBED AS BEING USEFUL AGAINST GRAM-NEGATIVE AND GRAM-POSITIVE INFECTIONS. THE PRODUCTS DESCRIBED HEREIN ARE ABSORBED SLOWLY IN THE BODY AND HENCE PROVIDE LONGER LASTING ANTI-MICROBIAL EFFECT.
Inventors
- 👤 J Hou
- 👤 J Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |