US3594358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst composition,process of preparation,and polymerization process and product
Assignee: Phillips Petroleum Co
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Filing: 1967-09-28
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Granted: 1971-07-20
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Expires: 1987-09-28
Abstract
Abstract A PREFORMED STABLE FREE RADICAL CATALYST IS FORMED BY IMPREGNATING A FREE RADICAL PRECURSOR ON SOLID PARTICLES OF A POLYMER OF AT LEAST ONE VINYL MONOMER. THE PREFORMED CATALYST CAN BE UTILIZED TO POLYEMERIZE SUBSTITUTED VINYL MONOMERS. THE POLYMER PRODUCTION RATE AND THE YIELD IN VAPOR PHASE POLYMERIZATION IS INCREASED BY INCORPORATING A SMALL AMOUNT OF A HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALKANES, CYCLOALKANES AND AROMATICS.
Inventors
- 👤 Charles W Moberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:21
CPC Classifications
C; C08; C08F; C08F291/00; C08F4/00
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |