US3582520A
Expired / Lapsed
US
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Stabilization of unsaturated interpolymers
Assignee: PPG Industries Inc
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Filing: 1968-09-30
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Granted: 1971-06-01
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Expires: 1988-09-30
Abstract
Abstract THIS INVENTION RELATES TO THE STABILIZATION OF INTERPOLYMERS OF ETHYLENIC HYDROCARBONS AND A POLYENE, WHICH INTERPOLYMERS CURE THROUGH AN OXIDATIVE MECHANISM. IT HAS BEEN FOUND THAT ALDIMINES AND KETIMINES STABILIZE THE INTERPOLYMER AGAINST APPARENT AUTOXIDATION, AS EVIDENCED BY FILM YELLOWING, WITHOUT INTERFERING SUBSTANTIALLY WITH THE OXIDATIVE CURE OF THE FILMS.
Inventors
- 👤 Marco Wismer
- 👤 Karl F Schimmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31909; Y10T428/31924
Claims Analysis
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |