US3084148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing diolefins
Assignee: Shell USA Inc
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Filing: 1959-08-17
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Granted: 1963-04-02
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Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Edward A Youngman
- 👤 Nozaki Kenzie
- 👤 Jr John Boor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR POLYMERIZING CONJUGATED DIOLEFIN HYDROCARBONS OF 4 TO 9 CARBON ATOMSPER MOLECULE WHICH COMPRISES CONTACTING THE CONJUGATED DIOLEFIN IN SUBSTANTALLY ANHYDROUS SOLUTION IN THE PRESENCE OF 15 TO 150 PARTS BY WEIGHT OF ZINC, PRESENT AS ZINC DIALKYL, PER MILLION PARTS OF SOLUTION, WITH A CATALYST CONSISTING OF DISSOLVED REACTION PRODUCT OF A SALT FROM THE GROUP CONSISTING OF DIVALENT NICKEL AND COBALT HALIDES WITH AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF ALUMINUM HALIDE AND ALUMINUM ALKYL COMPOUNDS, SAID AMOUNT OF ZINC DIALKYL BEING SELECTED TO CONTROL THE INTRINSIC VISCOSITY OF THE POLYDIOLEFIN PRODUCT TO A DESIRED VALUE WHICH IS LOWER THAN THAT RESULTING FROM POLYMERIZATION IN THE ABSENCE OF SAID ZINC DIALKYL.
Claim 2
Dependent Claim
117 words
A PROCESS FOR POLYMERIZING CONJUGATED DIOLEFIN HYDROCARBONS OF 4 TO 9 CARBON ATOMSPER MOLECULE WHICH COMPRISES CONTACTING THE CONJUGATED DIOLEFIN IN SUBSTANTALLY ANHYDROUS SOLUTION IN THE PRESENCE OF 15 TO 150 PARTS BY WEIGHT OF ZINC, PRESENT AS ZINC DIALKYL, PER MILLION PARTS OF SOLUTION, WITH A CATALYST CONSISTING OF DISSOLVED REACTION PRODUCT OF A SALT FROM THE GROUP CONSISTING OF DIVALENT NICKEL AND COBALT HALIDES WITH AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF ALUMINUM HALIDE AND ALUMINUM ALKYL COMPOUNDS, SAID AMOUNT OF ZINC DIALKYL BEING SELECTED TO CONTROL THE INTRINSIC VISCOSITY OF THE POLYDIOLEFIN PRODUCT TO A DESIRED VALUE WHICH IS LOWER THAN THAT RESULTING FROM POLYMERIZATION IN THE ABSENCE OF SAID ZINC DIALKYL.
References Cited (Backward Citations)
BE543292A
Cited
GB789781A
Cited
US2905659A
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US2953554A
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US2977349A
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US2953556A
Cited
US2965625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |