US2640825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo derivatives of carbostyril
Assignee: Wyeth Holdings LLC
•
Filing: 1949-06-17
•
Granted: 1953-06-02
•
Expires: 1969-06-17
Abstract
No abstract record available.
Inventors
- 👤 Seruto Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:58
CPC Classifications
C; C09; C09B; C09B43/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
GB189520530A
Cited
GB190928716A
Cited
US1052031A
Cited
US1775644A
Cited
US1908571A
Cited
US2364347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |