US3708520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl esters of dialkylhydroxyphenyl alkanoates
Assignee: Novartis Corp
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Filing: 1971-06-01
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Granted: 1973-01-02
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Expires: 1991-06-01
Abstract
Abstract VINYL ESTERS OF DIALKYLHYDROXYPHENYL ALKANOATE MONOMERS ARE PREPARED BY A DIRECT REACTION OF ACETYLENE WITH AN APPROPRIATE ACID OR THE ACIDOLYSIS OF VINYL ACETATE OR ISOPROPENYL ACETATE. THESE MONOMERS CAN BE POLYMERIZED WITH A FREE RADICAL INITIATOR YIELDING POLYMERIC MATERIALS WHICH WILL PROTECT ORGANIC MATERIALS IN GENERAL AND PARTICULARLY, SYNTHETIC POLYMERS SUCH AS POLYOLEFINS AGAINST OXIDATIVE AND THERMAL DEGRADATION.
Inventors
- 👤 D Steinberg
- 👤 M Dexter
- 👤 J Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/04; C10M129/10; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10N; C10N2030/00; C10N2030/10
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |