US2681906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridium penicillin
Assignee: Bristol Laboratories Inc
•
Filing: 1952-01-25
•
Granted: 1954-06-22
•
Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Alphonse P Granatek
- 👤 Gerard J Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:30
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A SALT OF PENICILLIN AND PHENYLAZO-ALPHA, ALPHA-DIAMINOPYRIDINE.
Claim 2
Dependent Claim
7 words
A SALT OF PENICILLIN AND PHENYLAZO-ALPHA, ALPHA-DIAMINOPYRIDINE.
References Cited (Backward Citations)
US2578641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |