US3637584A
Expired / Lapsed
US
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Stabilization of polyolefins
Assignee: Imperial Chemical Industries Ltd
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Filing: 1969-05-19
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Granted: 1972-01-25
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Expires: 1989-05-19
Abstract
Abstract POLY-A-OLEFINS DERIVED FROM MONO OLEFINS CONTAINING THREE OR MORE CARBON ATOMS ARE STABILISED AGAINST OXIDATIVE DEGRADATION BY 1,3-IMIDAZOLES IN WHCH THE 4 AND 5 POSITIONS ARE SUBSTITUTED BY ARYL GROUPS AND THE 2 POSITION BY A 2-HYDROXYPHENYL OR 4,5-DIARYL-1,3-IMIDAZOLE GROUP.
Inventors
- 👤 Ronald James Hurlock
- 👤 Eric Samuel Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |