US2560164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friedel-crafts treatment of unsaturated polymers
Assignee: Standard Oil Development Co
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Filing: 1946-12-28
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Granted: 1951-07-10
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Expires: 1966-12-28
Abstract
No abstract record available.
Inventors
- 👤 John D Garber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE CHEMICAL PROCESS CONSISTING ESSENTIALLY IN DISSOLVING IN ABOUT 15 TO 35% CONCENTRATION IN AN INERT SOLVENT A VISCOUS TO SOLID MODERATELY HIGH MOLECULAR WEIGHT POLYMERIZATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF A MULTI-OLEFIN HAVING 4 TO 14 CARBON ATOMS, AND COPOLYMERS OF AT LEAST 50% OF SUCH MULTIOLEFINS WITH A COMONOMER SELECTED FROM THE GROUP CONSISTING OF A MONO-OLEFIN HAVING 3 TO 20 CARBON ATOMS AND STYRENE, AND TREATING THE RESULTING SOLUTION WITH 0.1% TO 10% OF A FRIEDEL-CRAFTS ACTIVE METAL HALIDE CATALYST, IN THE ABSENCE OF ANY POLYMERIZATION MONOMERS, AT A TEMPERATURE OF -50* C. TO 100* C. TO RAISE THE MELTING POINT AND IMPROVE THE TOUGHNESS OF SAID POLYMERIZATION PRODUCT WITHOUT SIGNIFICANT CHANGE IN MOLECULAR WEIGHT.
Claim 2
Dependent Claim
122 words
THE CHEMICAL PROCESS CONSISTING ESSENTIALLY IN DISSOLVING IN ABOUT 15 TO 35% CONCENTRATION IN AN INERT SOLVENT A VISCOUS TO SOLID MODERATELY HIGH MOLECULAR WEIGHT POLYMERIZATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF A MULTI-OLEFIN HAVING 4 TO 14 CARBON ATOMS, AND COPOLYMERS OF AT LEAST 50% OF SUCH MULTIOLEFINS WITH A COMONOMER SELECTED FROM THE GROUP CONSISTING OF A MONO-OLEFIN HAVING 3 TO 20 CARBON ATOMS AND STYRENE, AND TREATING THE RESULTING SOLUTION WITH 0.1% TO 10% OF A FRIEDEL-CRAFTS ACTIVE METAL HALIDE CATALYST, IN THE ABSENCE OF ANY POLYMERIZATION MONOMERS, AT A TEMPERATURE OF -50* C. TO 100* C. TO RAISE THE MELTING POINT AND IMPROVE THE TOUGHNESS OF SAID POLYMERIZATION PRODUCT WITHOUT SIGNIFICANT CHANGE IN MOLECULAR WEIGHT.
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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |