US2860138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamate esters of hydroxyalkyl piperazino alkyl phenothiazines
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1956-11-21
•
Granted: 1958-11-11
•
Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Margaret H Sherlock
- 👤 Sperber Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:39
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS OF BASES HAVING THE FORMULA:
Claim 2
Dependent Claim
10 words
PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS OF BASES HAVING THE FORMULA:
References Cited (Backward Citations)
US2766235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |