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Patent US2947747A successfully refreshed from Google Patents.
US2947747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trifluoromethyl substituted phenoxazines
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1959-06-08
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Granted: 1960-08-02
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 Paul N Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:37
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/34; C07D265/38; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
CHEMICAL COMPOUNDS OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ORGANIC AND INORGANIC ACID ADDITION SALTS, THE FREE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
25 words
CHEMICAL COMPOUNDS OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ORGANIC AND INORGANIC ACID ADDITION SALTS, THE FREE BASE HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |