Patent US2745837A successfully refreshed from Google Patents.
US2745837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzhydryl ethers of alkyl piperidinols
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1954-01-21
•
Granted: 1956-05-15
•
Expires: 1974-01-21
Abstract
No abstract record available.
Inventors
- 👤 Papa Domenick
- 👤 Stephen B Coan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:02
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46; C07D211/42; C07D211/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2454092A
Cited
US2479843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |