US3655811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization process
Assignee: Atlantic Richfield Co
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Filing: 1968-07-15
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Granted: 1972-04-11
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Expires: 1988-07-15
Abstract
Abstract A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF: (A) AN ACTINIDE SERIES METAL COMPOUND, E.G., THORIUM NITRATE TETRAHYDRATE, (B) A REDUCING AGENT, E.G., ETHYLALUMINUM SESQUICHLORIDE, (C) A NON-PROTONIC LEWIS ACID, E.G., ETHYLALUMINUM SESQUICHLORIDE, AND , AS OPTIONAL, PREFERRED INGREDIENTS, (D) A TRIHYDROCARBYLPHOSPHINE, E.G., TRIPHENYLPHOSPHINE, AND (E) AN INERT, ORGANIC SOLVENT, E.G., CHLOROBENZENE, IS DISCLOSED AS BEING USEFUL FOR CATALYZING THE POLYMERIZATION OF OLEFINS OR PHENYL-SUBSTITUTED OLEFINS TO NORMALLY LIQUID POLYMERS OR OLIGOMERS, E.G., FOR CATALYZING THE DIMERIZATION OF PROPYLENE.
Inventors
- 👤 Jin Sun Yoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:55
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/122; B01J31/14; B01J31/143; B01J31/16; B01J31/24; B01J31/2404; B01J31/26; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; B01J2231/00; B01J2231/10; B01J2231/12; B01J2231/20; B01J2531/00; B01J2531/30; B01J2531/39; B01J27/00; B01J27/06; B01J27/08; B01J27/10; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24; Y; Y10; Y10S; Y10S376/00; Y10S376/90; Y10S376/901
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |