Patent US3642997A successfully refreshed from Google Patents.
US3642997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic carboxylic acids in the treatment of inflammation
Assignee: Merck and Co Inc
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Filing: 1969-06-25
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Granted: 1972-02-15
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Expires: 1989-06-25
Abstract
Abstract THIS INVENTION RELATES TO THE USE OF NEW TRICYCLIC CARBOXYLIC ACIDS IN THE TREATMENT OF INFLAMMATION.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Richard Greenwald
- 👤 Bruce E Witzel
- 👤 Gordon L Walford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:28
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/49; C07C205/57; C07C205/61; C07C205/27; C07C205/34; C07C205/35; C07C205/36; C07C205/38; C07C205/45; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C07C66/00; C07C66/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |