US2769002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phenthiazine compounds
Assignee: —
•
Filing: —
•
Granted: 1956-10-30
•
Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:01
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS FOR THE PRODUCTION OF A PHENTHIAZINE COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
A PROCESS FOR THE PRODUCTION OF A PHENTHIAZINE COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2645640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |