Patent US3660438A successfully refreshed from Google Patents.
US3660438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylhydroxyphenylalkanoyl hydrazines
Assignee: Novartis Corp
•
Filing: 1970-04-13
•
Granted: 1972-05-02
•
Expires: 1990-04-13
Abstract
Abstract NOVEL ALKYLHYDROXYPHENYLALKANOYL-HYDRAZINE COMPOUNDS ARE PREPAED BY REACTING AN ESTER OF AN ALKYLHYDROXYPHENYLALKANOIC ACID OR THE CORRESPONDING ALKANOIC ACID CHLORIDE WITH EITHER HYDRAZINE OR AN ACYL HYDRAZIDE. THE ALKYLHYDROXYPHENYLAKANOYL-HYDRAZINES ARE USEFUL AS STABILIZERS OF ORGANIC MATERIALS WHICH ARE SUBJECT TO OXIDATIVE DETERIORATION.
Inventors
- 👤 Martin Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:12
CPC Classifications
C; C10; C10M; C10M3/00; 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; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/18; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2040/00; C10N2040/20; C10N2040/22; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |