US3862134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylbenzofuran acrylic acid compounds and salts and esters thereof
Assignee: Riker Laboratories Inc
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Filing: 1971-11-16
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Granted: 1975-01-21
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Expires: 1991-11-16
Abstract
Abstract Benzofurans and 2,3-dihydrobenzofurans optionally substituted at the 2 position by halogen or lower alkyl, substituted at the 3 position by optionally substituted phenyl, substituted on the benzo ring by a lower alkanoic or acrylic acid group or a salt, ester or amide thereof, optionally substituted on the carbon of said lower alkanoic group bonded to the benzo ring, and optionally substituted on the benzo ring, are active antiinflammatory, anti-pyretic and analgesic agents or are intermediates in the preparation of such agents.
Inventors
- 👤 Robert A Scherrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:00
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; A; A61; A61P; A61P29/00; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A compound of the formula
Claim 2
Dependent Claim
10 words
A compound according to claim 1 wherein Z is hydroxyl.
Claim 3
Dependent Claim
10 words
A compound according to claim 1 wherein r is zero.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 in which R3 and R4 together form a carbon-carbon bond.
Claim 5
Dependent Claim
11 words
A compound according to claim 2 in which R5 is hydrogen.
Claim 6
Dependent Claim
4 words
The compound 2-(7-(2-methyl-3-phenylbenzofuran))acrylic acid.
References Cited (Backward Citations)
US3682976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |