Patent US3645970A successfully refreshed from Google Patents.
US3645970A
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Benzoate homopolymers hindered phenolic groups as stabilizers
Assignee: Novartis Corp
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Filing: 1969-10-01
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Granted: 1972-02-29
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Expires: 1989-10-01
Abstract
Abstract BENOZATE MONOMERS CONTAINING HINDERED PHENOLIC GROUPS ARE DERIVED FROM A,B-UNSATURATED ACIDS AND BENZOIC ACIDS CONTAINING HINDERED PHENOLIC GROUPS. THE MONOMERS ARE POLYMERIZED, BY A FREE RADICAL INITIATOR YIELDING POLYMERS WHICH ARE STABILIZED OF ORGANIC MATERIALS AGAINST DEGRADATION CAUSED BY OXIDATION AND ULTRAVIOLET LIGHT. THE POLYMERIC STABILIZERS CAN BE USED ALONE OR IN COMBINATION WITH OTHER STABLILIZERS.
Inventors
- 👤 Eduard Karl Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:57
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08K; C08K5/00; C08K5/04; C08K5/13; C08L; C08L101/00; C08L23/00; C08L23/02; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/084; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/11; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/062; C10M2215/08; C10M2215/082; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/222; C10M2215/24; C10M2215/26; C10M2215/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2219/086; C10M2219/087; C10M2219/089; C10M2219/09; C10M2223/00; C10M2223/06; C10M2223/065; C10N; C10N2040/00; C10N2040/20; C10N2040/22
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |