Patent US3799951A successfully refreshed from Google Patents.
US3799951A
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US
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Amino citric acid derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1971-12-02
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Granted: 1974-03-26
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Expires: 1991-12-02
Abstract
Abstract AMINO CITRIC ACIDS AND ESTERS, AND LACTAMS THEREOF, OF THE FORMULAS: R-OOC-C(-OH)(-CH2-COO-R)-CH(-NH2)-COO-R AND 2-(O=),4-(HO-),4,5-DI(R-OOC-)PYRROLIDINE WHEREIN ALL R GROUP ARE HYDROGEN OR THE SAME LOWER ALKYL, AND THE STEREOISOMERS, OPTICAL ANTIPODES AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, WHICH COMPOUNDS INHIBIT FATTY ACID SYNTHESIS IN BIOLOGICAL SYSTEMS AND ARE THUS USEFUL IN TREATMENT OF OBESITY AND IN CORRECTING CONDITIONS OF LIPID ABNORMALITES. ADDITIONALLY, EXPOXIDE, AZIDE AND SULFONATE ESTER INTERMEDIATES ARE DISCLOSED.
Inventors
- 👤 R Guthrie
- 👤 R Kierstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:40
CPC Classifications
C; C07; C07C; C07C247/00; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/273; C07D207/277; C07D207/28; C07D303/00; C07D303/02; C07D303/48
Claims Analysis
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |