US3718679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphine or phosphite gold complexes of thiomalic acid
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1971-04-27
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Granted: 1973-02-27
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Expires: 1991-04-27
Abstract
Abstract Phosphine or phosphite gold complexes of thiomalic acid having anti-arthritic activity are prepared by reaction of an appropriate phosphine or phosphite gold halide with thiomalic acid.
Inventors
- 👤 Gusty E Mc
- 👤 B Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:38
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5045
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
A compound according to claim 1 in which R is lower alkyl.
Claim 2
Dependent Claim
11 words
A compound according to claim 2 in which R is ethyl.
Claim 3
Dependent Claim
13 words
A compound according to claim 3 in the form of its disodium salt.
References Cited (Backward Citations)
US1994213A
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US2451841A
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US2352124A
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US2370592A
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US2509200A
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US2607789A
Cited
US2660549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |