US2763643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azacycloheptane compounds and methods for preparing them
Assignee: Wyeth LLC
•
Filing: 1954-09-03
•
Granted: 1956-09-18
•
Expires: 1974-09-03
Abstract
No abstract record available.
Inventors
- 👤 Richard F Tislow
- 👤 Huber Richard De Vere
- 👤 Diamond Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:47
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY AMMONIUM SALT CONTAINING THE CATION
Claim 2
Dependent Claim
7 words
A QUATERNARY AMMONIUM SALT CONTAINING THE CATION
References Cited (Backward Citations)
US2666050A
Cited
US2667493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |