US3773830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-aroyl-n'-(alkylhydroxyphenyl)alkanoylhydrazines
Assignee: Novartis Corp
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Filing: 1972-03-02
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Granted: 1973-11-20
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Expires: 1992-03-02
Abstract
Abstract N-BENXOYL N''-(ALKYLHYDROXYPHENYL)ALKANOYLHYDRAZINE COMPOUNDS HAVING THE FORMULA (4-HO,3-R1,R2-PHENYL)-CNH2N-CO-NH-NH-CO-C6H3(-R3)-R4 WHEREIN R1 IS A LOWER ALKYL GROUP, R2 IS HYDROGEN OR A LOWER ALKYL GROUP, R3 AND R4 ARE INDEPENDENTLY HYDROGEN, ALKYL, ALKOXY OR HALOGEN AND N IS 0 TO 5, ARE PREPARED BY REACTING AN ESTER OF AN ALKYLHYDROXYPHENYLALKANOIC ACID OR THE CORRESPONDING ACID CHLORIDE WITH HYDRAXINE AND THE RESULTING HYDRAZIDE IS THEN REACTED WITH A BENZOYL CHLORIDE. THESE COMPOUNDS ARE USEFUL AS STABILIZERS OF ORGANIC MATERIALS WHICH AE SUBJECT TO OXIDATIVE DETERIORATION.
Inventors
- 👤 M Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:26
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/38; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/25; C08L; C08L23/00; C08L23/02; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C09K15/24; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/18; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2040/00; C10N2040/20; C10N2040/22
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |