Patent US2536841A successfully refreshed from Google Patents.
US2536841A
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Low-temperature olefin polymerization with sulfur containing friedel-crafts complex catalysts
Assignee: Standard Oil Development Co
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Filing: 1945-12-04
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Granted: 1951-01-02
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Expires: 1965-12-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Dornte
- 👤 Jr John F Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:57
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A LOW TEMPERATURE POLYMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF COOLING A MIXTURE OF A MONOOLEFIN AND A MULTIOLEFIN TO A TEMPERATURE WITHIN THE RANGE BETWEEN 0* C. AND -164* C., AND ADDING THERETO A POLYMERIZATION CATALYST WHICH IS LIQUID AT THE POLYMERIZATION TEMPERATURE COMPRISING A DISSOLVED FRIEDELCRAFTS ACTIVE METAL HALIDE COMPLEX WITH A NONMETALLIC INORGANIC SULFUR CONTAINING COMPOUND, THE CATALYST HAVING A HIGH SOLUBILITY AND BEING IN SOLUTION IN A LOW-FREEZING, NON-COMPLEXFORMING SOLVENT WITHIN THE RANGE BETWEEN 0.1% AND 10% IN AN AMOUNT SUFFICIENT TO PRODUCE A DESIRED PERCENTAGE POLYMERIZATION OF UNSATURATES PRESENT TO PRODUCE A HIGH MOLECULAR WEIGHT POLYMER HAVING A STAUDINGER MOLECULAR WEIGHT NUMBER WITHIN THE RANGE BETWEEN 1.000 AND 500,000.
Claim 2
Dependent Claim
115 words
A LOW TEMPERATURE POLYMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF COOLING A MIXTURE OF A MONOOLEFIN AND A MULTIOLEFIN TO A TEMPERATURE WITHIN THE RANGE BETWEEN 0* C. AND -164* C., AND ADDING THERETO A POLYMERIZATION CATALYST WHICH IS LIQUID AT THE POLYMERIZATION TEMPERATURE COMPRISING A DISSOLVED FRIEDELCRAFTS ACTIVE METAL HALIDE COMPLEX WITH A NONMETALLIC INORGANIC SULFUR CONTAINING COMPOUND, THE CATALYST HAVING A HIGH SOLUBILITY AND BEING IN SOLUTION IN A LOW-FREEZING, NON-COMPLEXFORMING SOLVENT WITHIN THE RANGE BETWEEN 0.1% AND 10% IN AN AMOUNT SUFFICIENT TO PRODUCE A DESIRED PERCENTAGE POLYMERIZATION OF UNSATURATES PRESENT TO PRODUCE A HIGH MOLECULAR WEIGHT POLYMER HAVING A STAUDINGER MOLECULAR WEIGHT NUMBER WITHIN THE RANGE BETWEEN 1.000 AND 500,000.
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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) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |