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US3792014A
Expired / Lapsed
US
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Phenol antioxidant-gallic acid ester stabilizer system
Assignee: Ethyl Corp
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Filing: 1972-09-15
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Granted: 1974-02-12
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Expires: 1992-09-15
Abstract
Abstract OLEFINIC POLYMERS (E.G., POLYETHYLENE) NORMALLY SUBJECT TO ACCELERATED OXIDATIVE DEGRADATION WHEN USED IN CONTACT WITH COPPER ARE STABILIZE FOR PROLONGED PERIODS BY INCLUSION OF A HYDROCARBYL ESTER OF GALLIC ACID (E.G., PROPYL GALLATE) TOGETHER WITH A PHENOLIC ANTIOXIDANT FOR OLEFINIC POLYMERS. THE COMPOSITIONS ARE ESPECIALLY USEFUL FOR EXTENDING THE SERVICE LIFE OF POLYOLEFIN COPPER WIRE INSULATION.
Inventors
- 👤 K Ihrman
- 👤 R Malec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31692
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |