US3671580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted biphenyl acetic acids and ester derivatives thereof
Assignee: Merck and Co Inc
•
Filing: 1969-12-22
•
Granted: 1972-06-20
•
Expires: 1989-12-22
Abstract
Abstract New 4(and 5)-substituted phenylacetic acids useful as antiinflammatory, analgesic and anti-pyretic agents.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Conrad P Dorn Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/07; C07C205/11; C07C245/00; C07C245/12; C07C245/14; C07C37/00; C07C37/01; C07C37/045; C07C37/055; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07C59/00; C07C59/40; C07C59/42; C07C59/56; C07C65/00; C07C65/01; C07C65/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A compound of the formula:
Claim 2
Dependent Claim
2 words
2-Hydroxy-5-(4''-fluorophenyl)-phenylacetic acid.
Claim 3
Dependent Claim
2 words
2-Hydroxy-4-(4''-fluorophenyl)-phenylacetic acid.
References Cited (Backward Citations)
FR5737M
Cited
US3457300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |