US3833636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers stabilized with acyl hydrazones
Assignee: Novartis Corp
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Filing: 1972-11-22
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Granted: 1974-09-03
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Expires: 1992-11-22
Abstract
Abstract NEW ACYL HYDRAZONES OF 2,2,6,6-TETRAMETHLYPIPERIDIN-4ONE ARE USED AS STABILIZERS FOR ORGANIC MATERIALS.
Inventors
- 👤 J Jack
- 👤 B Holt
- 👤 D Randell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |