US3644282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ternary stabilizer system for polyolefins
Assignee: Phillips Petroleum Co
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Filing: 1969-02-24
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Granted: 1972-02-22
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Expires: 1989-02-24
Abstract
Abstract A POLYMER STABILIZER COMPRISING MIXTURES OF DIESTERS OF THIODICAROXYLIC ACIDS. IN ANOTHER EMBODIMENT, SAID POLYMER STABILIZER FURTHER COMPRISES AT LEAST ONE HINDERED MONO OR POLYPHENOLIC COMPOUND. IN ANTOHER EMBODIMENT, SAID DIESTERS OF THIODICARBOXYLIC ACIDS ARE PRODUCED BY REACTING A MIXTURE OF ALCOHOLS CHARACTERIZED BY THE FORMULAS ROH AND R''OH WHEREIN R AND R'' ARE THE SAME OR DIFFERENT AND ARE HYDROCARBON RADICALS SELECTED FROM THE GROUP CONSISTING OF ALKYL OR CYCLOALKYL-SUBSTITUTED ALKYL IN THE RANGE OF FROM 10 TO 20 CARBON ATOMS PER R AND R'' GROUP WITH AT LEAST ONE THIODICARBOXYLIC ACID OF THE FORMULA S-(CNH2NCOOH)2 WHEREIN N IS AN INTEGER FROM 1 TO 6.
Inventors
- 👤 Clarence R Bresson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |