Patent US3641218A successfully refreshed from Google Patents.
US3641218A
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Hydrogenated bis phenol diphosphites
Assignee: Borg Warner Corp
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Filing: 1968-08-29
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Granted: 1972-02-08
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Expires: 1988-08-29
Abstract
Abstract COMPOUNDS ARE PREPARED HAVING THE FORMULA R1-O-P(-O-R2)-O-Z-O-P(-O-R3)-O-R4 WHERE R1, R2, R3 AND R4 ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKENYL, HALOALKYL HALOARYL OR THE MONOVALENT RESIDUE OF A HYDROGENATED DIHYDRIC PHENOL, Z IS THE DIVALENT RESIDUE OF A DIHYDRIC ALCOHOL OR A HYDROGENATED DIHYDRIC PHENOL, AT LEAST ONE OF R1, R2, R3 AND R4 IS A RESIDUE OF A HYDROGENATED DIHYDRIC PHENOL. PREFERABLY AT LEAST 3 OF R1, R2, R3 AND R4 ARE SUCH A HYDROGENATED DIHYDRIC PHENOL RESIDUE. THE COMPOUNDS ARE USEFUL AS STABILIZERS FOR HALOGEN CONTAINING POLYMERS, HYDROCARBON POLYMERS, HYDROCARBON OILS, POLYURETHANES AND POLYESTERS.
Inventors
- 👤 Lester Friedman
- 👤 Kenneth H Rattenbury
- 👤 Alvin Guttag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:14
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/145; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |