US2650919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic esters of phenothiazine-io-car
Assignee: —
•
Filing: —
•
Granted: 1953-09-01
•
Expires: 1970-09-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:35
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/30; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/5415; C07D279/20; C07D279/24; C07D417/00; C07D417/02; C07D417/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A MEMBER OF THE CLASS CONSISTING OF A BASIC ESTER AND QUATERNARY AMMONIUM AND ACID ADDITION SALTS THEREOF, SAID BASIC ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
A MEMBER OF THE CLASS CONSISTING OF A BASIC ESTER AND QUATERNARY AMMONIUM AND ACID ADDITION SALTS THEREOF, SAID BASIC ESTER HAVING THE FORMULA
References Cited (Backward Citations)
US2089985A
Cited
US2170037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |