US3746758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphine oxide and phosphonyl dichlorides of alkylated rho-hydroxyphenyl-alkanes
Assignee: Novartis Corp
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Filing: 1970-09-30
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Granted: 1973-07-17
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Expires: 1990-09-30
Abstract
Abstract PHOSPHINE OXIDES AND PHOSPHONYL DICHLORIDES ARE PREPARED FROM ALKYLATED P-HYDROXYPHENYLALKYL HALIDES AND PHOSPHOROUS HALIDES IN THE PRESENCE OF A COMPLEXING METAL HALIDE LEWIS ACID FOLLOWED BY DISSOCIATION OF THE REACTION COMPLEX WITH WATER. THE PHOSPHINE OXIDES ARE USEFUL AS STABILIZERS OF ORGANIC MATERIALS WHICH ARE SUBJECT TO OXIDATIVE DETERIORATION. THE PHOSPHONYL DICHLORIDES ARE USEFUL AS INTERMEDIATES IN PREPARING THE CORRESPONDING PHOSPHONATES WHICH IN TURN ARE USEFUL AS STABILIZERS FOR ORGANIC MATERIALS WHICH ARE SUBJECT TO OXIDATIVE DETERIORATION.
Inventors
- 👤 J Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5333; C07F9/38; C07F9/3804; C07F9/3882; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C10; C10M; C10M1/00; C10M1/08; C11; C11B; C11B5/00; C11B5/0071; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/085; C10M2223/00; C10M2223/06; C10M2223/061; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 0
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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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |