Patent US3720082A successfully refreshed from Google Patents.
Patent US4233452A successfully refreshed from Google Patents.
US4233452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of glycolic and glyoxylic acid as inhibitors of glycolic acid oxidase
Assignee: Merck and Co Inc
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Filing: 1979-05-03
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Granted: 1980-11-11
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Expires: 1999-05-03
Abstract
Abstract Novel derivatives of glycolic and glyoxylic acid are disclosed which inhibit glycolic acid oxidase and thus are useful in the treatment and prevention of calcium oxalate urolithiasis (calcium oxalate kidney and bladder stone disease).
Inventors
- 👤 Haydn W. R. Williams
- 👤 Edward J. Cragoe, Jr.
- 👤 Clarence S. Rooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:40
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/325; C07C; C07C321/00; C07D207/327; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
5-Benzylthien-2-ylglyoxylic acid.
Claim 2
Dependent Claim
2 words
5-Benzylthien-2-ylglyoxylic acid.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |