US3192204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trifluoromethylthiaxanthene and -xanthene derivatives
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1960-03-07
•
Granted: 1965-06-29
•
Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Paul N Craig
- 👤 Charles L Zirkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:07
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A CHEMICAL COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC, PHARMACEUTICALLY ACCEPTABLE, ACID SOLUTION SALTS THE FREE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
25 words
A CHEMICAL COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC, PHARMACEUTICALLY ACCEPTABLE, ACID SOLUTION SALTS THE FREE BASE HAVING THE FORMULA:
References Cited (Backward Citations)
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US2996503A
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BE551400A
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US2921069A
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US2951082A
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US2928767A
Cited
US2940969A
Cited
US3113137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |