Patent US3655697A successfully refreshed from Google Patents.
US3655697A
Expired / Lapsed
US
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Ortho-hydroxydibenzofuran carboxylic acid and acid derivatives substituted by a halogen atom
Assignee: Merck and Co Inc
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Filing: 1969-06-25
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Granted: 1972-04-11
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Expires: 1989-06-25
Abstract
Abstract THIS INVENTION RELATES TO NEW TRICYCLIC CARBOXYLIC ACID AND ESTER DERIVATIVES AND PROCESSES FOR THEIR PREPARATION. THESE COMPOUNDS HAVE ANTI-INFLAMMATORY, ANTI-PYRETIC AND ANALGESIC ACTIVITY. ALSO INCLUDED ARE CLAIMS FOR METHODS OF TREATING INFLAMMATION USING THE CARBOXYLIC ACID COMPOUNDS OF THIS INVENTION.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Bruce E Witzel
- 👤 Gordon L Walford
- 👤 William V Ruyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:27
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/91; C07D333/00; C07D333/50; C07D333/76
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |