US2644809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friedel-crafts isobutylene polymerizations in chlorofluoroalkane solution
Assignee: Standard Oil Development Co
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Filing: 1950-01-11
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Granted: 1953-07-07
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Expires: 1970-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John S Saylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:33
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A POLYFMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF MIXING TOGETHER A MAJOR PROPORTION OF A MONOOLEFIN HAVING FROM 4 TO 8, INCLUSIVE, CARBON ATOMS PER MOLECULE, WITH A MINOR PROPORTION OF A MULTIOLEFIN HAVING FROM 4 TO 14, INCLUSIVE, CARBON ATOMS PER MOLECULE, AND POLYMERIZING THE RESULTING MIXTURE WITH A DIS SOLVED FRIEDEL-CRAFTS CATALYST, IN THE PRESENCE OF FROM 1 TO 10 VOLUMES (COMPUTED UPON THE MIXED OLEFINS) OF A LIQUID SELECTED FROM THE GROUP CONSISTING OF DICHLORODIFLUORMETHANE, TRICHLOROMONOFLUORMETHANE, DICHLOROMONOFLUORMETHANE, DICHLOROTETRAFLUORETHANE, AND MIXTURES THEREOF, THE MONOOLEFIN AND MULTIOLEFIN BEING DISSOLVED IN SAID LIQUID, AND CARRYING OUT THE POLYMERIZATION AT A TEMPERATURE BETWEEN -20* C. AND THE FREEZING POINT OF THE LIQUID, THE RESULTING POLYMER BEING CHARACTERIZED BY A HIGHER UNSATURATION AND HIGHER CURING RATE.
Claim 2
Dependent Claim
125 words
A POLYFMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF MIXING TOGETHER A MAJOR PROPORTION OF A MONOOLEFIN HAVING FROM 4 TO 8, INCLUSIVE, CARBON ATOMS PER MOLECULE, WITH A MINOR PROPORTION OF A MULTIOLEFIN HAVING FROM 4 TO 14, INCLUSIVE, CARBON ATOMS PER MOLECULE, AND POLYMERIZING THE RESULTING MIXTURE WITH A DIS SOLVED FRIEDEL-CRAFTS CATALYST, IN THE PRESENCE OF FROM 1 TO 10 VOLUMES (COMPUTED UPON THE MIXED OLEFINS) OF A LIQUID SELECTED FROM THE GROUP CONSISTING OF DICHLORODIFLUORMETHANE, TRICHLOROMONOFLUORMETHANE, DICHLOROMONOFLUORMETHANE, DICHLOROTETRAFLUORETHANE, AND MIXTURES THEREOF, THE MONOOLEFIN AND MULTIOLEFIN BEING DISSOLVED IN SAID LIQUID, AND CARRYING OUT THE POLYMERIZATION AT A TEMPERATURE BETWEEN -20* C. AND THE FREEZING POINT OF THE LIQUID, THE RESULTING POLYMER BEING CHARACTERIZED BY A HIGHER UNSATURATION AND HIGHER CURING RATE.
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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |