US3929833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic compounds
Assignee: Sandoz AG
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Filing: 1974-05-09
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Granted: 1975-12-30
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Expires: 1994-05-09
Abstract
Abstract The invention provides thiophenecarboxylic acid derivatives of the formula: WHEREIN R1 is hydrogen or alkyl of 1 to 4 carbon atoms, R2 is hydrogen, chlorine, or alkyl or alkoxy of 1 to 3 carbon atoms, and R3 is hydrogen, chlorine, bromine, or alkyl or alkoxy of 1 to 3 carbon atoms, or, when R2 denotes hydrogen, may also be fluorine or trifluoromethyl, AND WHEN R1 is hydrogen, pharmaceutically acceptable salts thereof. The compounds are useful antiphlogistics and analgesics.
Inventors
- 👤 Manfred Krieger
- 👤 Rudolf Suess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:01
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38; A; A61; A61K; A61K31/00; A61K31/33; A61K31/38; A61K31/381; C07D333/06; C07D333/24; C07D333/40; C07D409/00; C07D409/02; C07D409/04; C07D409/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
8 words
THE COMPOUND, WHICH IS 3-HYDROXY-2-(4-METHOXYPHENYL)-4-THIOPENECARBOXYLIC ACID ETHYL ESTER.
Claim 2
Dependent Claim
8 words
THE COMPOUND, WHICH IS 3-HYDROXY-2-(4-METHOXYPHENYL)-4-THIOPENECARBOXYLIC ACID ETHYL ESTER.
Claim 3
Dependent Claim
8 words
The compound, which is 2-(4-chlorophenyl)-3-hydroxy-4-thiophenecarboxylic acid ethyl ester.
Claim 4
Dependent Claim
8 words
The compound, which is 2-(4-chlorophenyl)-3-hydroxy-4-thiophenecarboxylic acid ethyl ester.
Claim 5
Dependent Claim
8 words
The compound, which is 2-(4-fluorophenyl)-3-hydroxy-4-thiophenecarboxylic acid ethyl ester.
Claim 6
Dependent Claim
8 words
The compound, which is 2-(4-fluorophenyl)-3-hydroxy-4-thiophenecarboxylic acid ethyl ester.
Claim 7
Dependent Claim
8 words
THE COMPOUND, WHICH IS 2-(3-CHLOROPHENYL)-3-HYDROXY4-THIOPHENECARBOXYLIC ACID ETHYL ESTER.
Claim 8
Dependent Claim
8 words
THE COMPOUND, WHICH IS 2-(3-CHLOROPHENYL)-3-HYDROXY4-THIOPHENECARBOXYLIC ACID ETHYL ESTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |