US3769372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyol esters of alkylated-4-hydroxybenzyl phosphinic acids
Assignee: Novartis Corp
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Filing: 1971-05-24
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Granted: 1973-10-30
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Expires: 1991-05-24
Abstract
Abstract POLYOL ESTERS OF ALKYLATED-4-HYDROXYBENZYL PHOSPHINIC ACIDS OF THIS INVENTION EFFECTIVELY STABILIZE ORGANIC MATERAILS AGAINST THE EFFECTS OF HEAT, LIGHT, AND OXYGEN. THE ESTERS OF THIS INVENTION ARE PREPARED BY TRANSESTERIFYING A PHENYL ALKYLATED-4-HYDROXBENXYL PHOSPHINATE WITH THE APPROPRIATE POLYOL USING CONVENTIONAL TECHNIQUES OR BY REACTING AN ACID HALIDE OF AN ALKYLATED-4-HYDROXYBENZYLPHOSPHINIC ACID WITH THE APPROPRIATE POLYOL IN THE PRESENCE OF A TERTIARY AMINE. AN EXAMPLE OF THIS CASE OF STABILIZERS IS 2,2,4,4-TETRAMETHYL-1,3-CYCLOBUTANEDIOL-BIS(3,5-DI-TERT - BUTYL - 4 - HYDROXYBENZYL) BENZENEPHOSPHINATE).
Inventors
- 👤 J Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/32; C07F9/3205; C07F9/3241; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5313; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2223/00; C10M2223/06; C10M2223/061
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |