US2932643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guanidine salts of barbituric acids
Assignee: —
•
Filing: —
•
Granted: 1960-04-12
•
Expires: 1977-04-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:18
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/10; C07C; C07C279/00; C07C279/04; C07C281/00; C07C281/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
A STABLE, CRYSTALLINE, NON-HYGROSCOPIC, BIS-GUANIDINE SALT OF A THERAPEUTICALLY USEFUL ACID HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |