Patent US3228917A successfully refreshed from Google Patents.
US3228917A
Expired / Lapsed
US
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Method of polymerizing olefins with nickel or cobalt salt-organophosphine complex and an acidic metal halide
Assignee: Uniroyal Inc
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Filing: 1962-08-07
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Granted: 1966-01-11
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Expires: 1982-08-07
Abstract
No abstract record available.
Inventors
- 👤 Clifford W Childers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:56
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F10/00; C08F110/00; C08F110/04; C08F110/06; C08F110/08; C08F110/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF COPLOYMERIZING BUTADIENE WITH A COMONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ISOBUTYLENE AND PROPYLENE, COMPRISING CONTACTING THE BUTADIENE AND SAID CO-MONOMER, IN ADMIXTURE IN AN INERT, DRY, ORGANIC SOLVENT MEDIUM, WITH A CATALYST COMPRISING THE INTERACTION PRODUCT OF AN ORGANO-PHOSPHINE-METAL SALT COMPLEX (R3P)2MX2 AND AN ACIDIC METAL HALIDE M''X''N, IN WHICH R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF PHENYL AND BUTYL; M IS SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT; X'' IS SELECTED FROM THE GROUP CONSISTING OF FLUORINE, CHLORINE AND BROMINE, WHEREBY A HIGH MOLECULAR WEIGHT POLYMER, HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.1 IN BENZENE, IN WHICH MORE THAN 40% OF THE BUTADIENE UNITS HAVE THE CIS-1,4 CONFIGURATION, IS FORMED
Claim 2
Independent Claim
123 words
A METHOD OF COPLOYMERIZING BUTADIENE WITH A COMONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ISOBUTYLENE AND PROPYLENE, COMPRISING CONTACTING THE BUTADIENE AND SAID CO-MONOMER, IN ADMIXTURE IN AN INERT, DRY, ORGANIC SOLVENT MEDIUM, WITH A CATALYST COMPRISING THE INTERACTION PRODUCT OF AN ORGANO-PHOSPHINE-METAL SALT COMPLEX (R3P)2MX2 AND AN ACIDIC METAL HALIDE M''X''N, IN WHICH R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF PHENYL AND BUTYL; M IS SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT; X'' IS SELECTED FROM THE GROUP CONSISTING OF FLUORINE, CHLORINE AND BROMINE, WHEREBY A HIGH MOLECULAR WEIGHT POLYMER, HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.1 IN BENZENE, IN WHICH MORE THAN 40% OF THE BUTADIENE UNITS HAVE THE CIS-1,4 CONFIGURATION, IS FORMED
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |