Patent US2921069A successfully refreshed from Google Patents.
US2921069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted trifluroromethylpheno-thiazine derivatives
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1956-04-09
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Granted: 1960-01-12
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Glenn E Ullyot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:48
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/24; C07D279/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A THERAPEUTIC COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ACID ADDITION SALTS, THE FREE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
23 words
A THERAPEUTIC COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ACID ADDITION SALTS, THE FREE BASE HAVING THE FORMULA:
References Cited (Backward Citations)
US2534237A
Cited
US2645640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |