Patent US3580898A successfully refreshed from Google Patents.
US3580898A
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US
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Vapor phase polymerization of butene-1
Assignee: Honeywell International Inc
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Filing: 1968-05-28
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Granted: 1971-05-25
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Expires: 1988-05-28
Abstract
Abstract VAPOR PHASE POLYMERIZATION OF BUTENE-1 USING ZIEGLERNATTA STEREOREGULATING CATALYST WITH DIETHYL ALUMINUM CHLORIDE AS CO-CATALYST. MAINTAINING INITIAL TEMPERATURE LESS THAN ABOUT 26*C. AFFORDS POWDER OR GRANULAR POLY-(BUTENE-1) RESIN OF HIGH ISOTACTICITY, SUITABLE FOR POWDER MOLDING. AFTER INITIAL PHASE OF POLYMERIZATION (WHEN SUFFICIENT POLYMER HAS BEEN FORMED TO FILL AT LEAST ABOUT 10% OF THE REACTOR VOLUME), TEMPERATURE AND PRESSURE CAN BE RAISED IN ORDER TO INCREASE REACTION RATE WITHOUT CAUSING AGGLOMERATION OF PRODUCT. MOLECULAR WEIGHT OFPOLY(BUTENE-1) IS CONTROLLED WITHOUT AFFECTING GRANULARITY BY SUPPLYING HYDROGEN INTO THE REACTION MEDIUM.
Inventors
- 👤 Milton K Rosen
- 👤 Charles D Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/04; C08F110/08; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/909
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |