US3629189A
Expired / Lapsed
US
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Enhancement of resistance of olefin polymers to copper-catalyzed oxidative degradation
Assignee: Argus Chemical Corp
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Filing: 1969-05-27
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Granted: 1971-12-21
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Expires: 1989-05-27
Abstract
Abstract HETEROCYCLIC HYDRAZINES AND LACTAMS ARE PROVIDED WHICH ARE USEFUL IN THE ENHANCEMENT OF THE RESISTANCE OF OLEFIN POLYMERS TO COPPER-CATALYZED OXIDATIVE DETERIORATION. IN ADDITION, THERE ARE ALSO PROVIDED STABILIZER COMPOSITIONS CONSISTING ESSENTIALLY OF AT LEAST ONE OLEFIN POLYMER STABILIZER AND HETEROCYCLIC HYDRAZINES OR LACTAMS; OLEFIN POLYMER COMPOSITIONS, SUCH AS PROPYLENE POLYMER COMPOSITIONS, CONTAINING HETEROCYCLIC HYDRAZINES OR LACTAMS; AND A PROCESS FOR ENHANCING THE RESISTANCE OF OLEFIN POLYMERS TO COPPER-CATALYZED DEGRADATION BY INCORPORATION OF SUCH COMPOUNDS OR OF SUCH STABILIZER COMPOSITIONS.
Inventors
- 👤 Motonobu Minagawa
- 👤 Kenichi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/0008; C08K5/005; C08K5/3467; C08K5/3472
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |