Patent US4126625A successfully refreshed from Google Patents.
US4126625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 5-substituted-3-methyl-2-benzofuran acetic acids
Assignee: KH Neochem Co Ltd
•
Filing: 1976-07-12
•
Granted: 1978-11-21
•
Expires: 1996-07-12
Abstract
Abstract This invention relates to certain derivatives of benzo (b) furylacetic acid, namely, 5-substituted-3-methyl-2-benzo(b)furylacetic acids having interesting pharmacological properties, in particular an antiphlogistic and analgesic activity.
Inventors
- 👤 Shigetaka Yoshina, deceased
- 👤 legal heir by Teruko Yoshina
- 👤 Tsutomu Kameyama
- 👤 Yoshimasa Oiji
- 👤 Akira Kiyohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:09
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
A compound of the formula ##STR11## wherein R is a member of the group consisting of ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl; and physiologically acceptable salts thereof.
Claim 2
Dependent Claim
28 words
A compound of the formula ##STR11## wherein R is a member of the group consisting of ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl; and physiologically acceptable salts thereof.
Claim 3
Dependent Claim
16 words
A compound selected from the group consisting of 5-tert-butyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 4
Dependent Claim
16 words
A compound selected from the group consisting of 5-tert-butyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 5
Dependent Claim
16 words
A compound selected from the group consisting of 5-phenyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 6
Dependent Claim
16 words
A compound selected from the group consisting of 5-phenyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 7
Dependent Claim
16 words
A compound selected from the group consisting of 5-benzyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 8
Dependent Claim
16 words
A compound selected from the group consisting of 5-benzyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 9
Dependent Claim
16 words
A compound selected from the group consisting of 5-cyclohexyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
Claim 10
Dependent Claim
16 words
A compound selected from the group consisting of 5-cyclohexyl-3-methyl-2-benzo(b)furylacetic acid and a physiologically acceptable salt thereof.
References Cited (Backward Citations)
US3682976A
Cited
US3862134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |