Patent US3635839A successfully refreshed from Google Patents.
US3635839A
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Modified catalyst system for stereospecific polymerization of olefins
Assignee: Mobil Oil AS
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Filing: 1968-09-11
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Granted: 1972-01-18
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Expires: 1988-09-11
Abstract
Abstract Homopolymers and copolymers of 1-olefins (C3-C10) having a high degree of tacticity are produced in the presence of a novel catalyst system composed of (A) a compound of a transitional metal of Groups IVA, VA, VIA, and VIII of the Periodic Arrangement of the Elements wherein the metal is present in a valence state lower than its maximum and (B) the reaction product of a dialkyl-aluminum chloride and iodine.
Inventors
- 👤 Raymond Eichenbaum
- 👤 James G Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:51
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A catalyst system of claim 1, wherein component B is diethylaluminum chloride.
References Cited (Backward Citations)
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 |