US2921072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nicotinic acid substituents of barbituric acid
Assignee: Individual
•
Filing: 1956-10-18
•
Granted: 1960-01-12
•
Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Edgar A Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/60; C07D239/62; C07D239/64; C07D401/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2703322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |