Patent US3839431A successfully refreshed from Google Patents.
US3839431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclopropylmethylphenylacetic acids and derivatives
Assignee: ER Squibb and Sons LLC
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Filing: 1971-06-08
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Granted: 1974-10-01
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Expires: 1991-06-08
Abstract
Abstract 1. A COMPOUND OF THE FORMULA CYCLOPROPYL-CO-(2-R4-1,4-PHENYLENE)-C(-R2)(-R3)-COOH WHEREIN R2 AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL AND R4 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROXY, LOWER ALKYL, LOWER ALKOXY, LOWER ALKANOYLOXY, HALOGEN AND TRIFLUOROMETHYL; AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF.
Inventors
- 👤 S Levine
- 👤 G Rovnyak
- 👤 J Sheehan
- 👤 P Diassi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:36
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/46; C07C275/48; C07C275/50; C07C243/00; C07C275/04; C07C275/20; C07C275/24; C07C33/00; C07C33/34; C07C45/00; C07C45/41; C07C45/45; C07C45/46; C07C45/61; C07C45/63; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C07C2601/00; C07C2601/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |