US3635930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon disulfide with trialkyl phosphine as adjuvant for polymerization catalyst and polymerization process
Assignee: Phillips Petroleum Co
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Filing: 1969-03-27
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Granted: 1972-01-18
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Expires: 1989-03-27
Abstract
Abstract CARBON DISULFIDE ALONE OR WITH AN ALKYL PHOSPHINE, E.G. TRIBUTYL PHOSPHINE COMPLEX, IS USED AS ADJUVANT FOR TITANIUM TRICHLORIDE-ALUMINUM CHLORIDE-ORGANOALUMINUM OR ORGANOALUMINUM HALIDE CATALYST SUITABLE FOR POLYMERIZATION OF 1-OLEFINS, E.G., PROPYLENE. POLYMERS HAVING HIGHER THAN USUAL MODULUS AND LOWER THAN USUAL XYLENES-SOLUBLE CONTENT ARE PRODUCIBLE WITH THE IMPROVED CATALYST AT USUAL CONDIDTIONS. A SYNERGISTIC EFFECT HAS BEEN DISCOVERED WITH RESPECT TO FLEXURAL MODULUS AND EXYLENE-SOLUBLE CONTENT OF THE POLYMER PREPARED.
Inventors
- 👤 Lawrence M Fodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:23
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |