Patent US3562357A successfully refreshed from Google Patents.
US3562357A
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Method for increasing yield of copolymers of butene-1 with long chain olefins
Assignee: Mobil Oil AS
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Filing: 1968-12-11
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Granted: 1971-02-09
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Expires: 1988-12-11
Abstract
Abstract COPOLYMERS OF BUTENE-1 AND C10-C18 ALPHA OLEFINS HAVE LOW BRITTLE TEMPERATURES. YIELD OF POLYMER IS INCREASED BY FIRST REACTING ZIEGLER-NATTA CATALYST WITH THE C10-C18 ALPHA OLEFIN AT 10-40* C. FOR 4-20 HOURS, AND THEN INTRODUCING THE CATALYST AND PREPOLYMER, THUS OBTAINED, INTO THE MAIN BUTENE-1, POLYMERIZATION.
Inventors
- 👤 Raymond Eichenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:40
CPC Classifications
C; C08; C08F; C08F210/00
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |