US3810869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidatively stabilized polymer compositions
Assignee: Ethyl Corp
•
Filing: 1970-05-06
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Granted: 1974-05-14
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Expires: 1990-05-06
Abstract
Abstract ORGANIC MATERIAL IS STABILIZED BY SMALL AMOUNTS OF ESTER OF (DIHYDROCARBYL-4-HYDROXYBENZYL) THIO- OR OXY-) ALKANOIC ACIDS. FOR EXAMPLE, POLYPROPYLENE IS STABILIZED BY PENTACRYTHRITOL TETRAKIS(2-((3,5-DI-TERT-BUTYL-4- HYDROXYBENZYL)THIO)ACETATE). DIALKYLTHIO-DIALKANOATES AND PHOSPHITES ACT AS SYNERGISTS.
Inventors
- 👤 E Zaweski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C07; C07C; C07C323/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |