US3819708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N,n'-disubstituted-p-phenylenediamines
Assignee: Sandoz AG
•
Filing: 1971-12-22
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Granted: 1974-06-25
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Expires: 1991-12-22
Abstract
Abstract N,N''-DISUBSTITUTED - P - PHENYLENEDIAMINES, E.G., N-(3ISOPROPOXYPROPYL)-N''-(2 - OCTYL)-P-PHENYLENEDIAMINE OR N-PHENETHYL-N''-(2 - OCTYL)-P-PHENYLENEDIAMINE, ARE PREPARED BY CONDENSING PHENYLENEDIAMINES WITH AN ALKYL CARBONYL IN THE PRESENCE OF A REDUCING CATALYST, AND ARE USEFUL AS HYPOLIPIDEMIC AND ANTI-OBESITY AGENTS.
Inventors
- 👤 R Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:52
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/02; C07C217/04; C07C217/06; C07C217/08
Claims Analysis
Total Claims: 0
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |