US2523150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous copolymers of diolefins with refinery c. cuts
Assignee: Standard Oil Development Co
•
Filing: 1946-09-28
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Granted: 1950-09-19
•
Expires: 1966-09-28
Abstract
No abstract record available.
Inventors
- 👤 Helmuth G Schneider
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:21
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A POLYMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF MIXING TOGETHER SUBSTANTIALLY EQUAL PROPORTIONS OF A MULTIOLEFIN HAVING FROM 4 TO 14, INCLUSIVE, CARBON ATOMS PER MOLECULE, OF GOOD PURITY, AND A REFINERY C4 CUT COMPOSED OF APPROXIMATELY HALF OF ITS VOLUME OF PROPANE, BUTANE, ISOBUTANE, FROM 15% TO 35% OF ISOBUTYLENE, APPROXIMATELY 27% OF THE NORMAL BUTENES, AND TRACES OF C3 AND C5 COMPONENTS, COOLING THE MIXTURE TO A TEMPERATURE WITHIN THE RANGE BETWEEN +15*C. AND -35*C., AND POLYMERIZING THE COLD MIXTURE BY THE APPLICATION THERETO OF A FRIEDEL-CRAFTS ACTIVE METAL HALIDE CATALYST IN SOLUTION IN A LOW FREEZING, NONCOMPLEX FORMING SOLVENT TO PRODUCE A HARD RESIN WHICH IS A NON-ELASTOMER, HAVING A MELTING POINT (BY THE BALL AND RING METHOD) WITHIN THE RANGE BETWEEN 75*C., AND 117*C., AND A VERY LIGHT COLOR.
Claim 2
Dependent Claim
134 words
A POLYMERIZATION PROCESS COMPRISING THE STEPS IN COMBINATION OF MIXING TOGETHER SUBSTANTIALLY EQUAL PROPORTIONS OF A MULTIOLEFIN HAVING FROM 4 TO 14, INCLUSIVE, CARBON ATOMS PER MOLECULE, OF GOOD PURITY, AND A REFINERY C4 CUT COMPOSED OF APPROXIMATELY HALF OF ITS VOLUME OF PROPANE, BUTANE, ISOBUTANE, FROM 15% TO 35% OF ISOBUTYLENE, APPROXIMATELY 27% OF THE NORMAL BUTENES, AND TRACES OF C3 AND C5 COMPONENTS, COOLING THE MIXTURE TO A TEMPERATURE WITHIN THE RANGE BETWEEN +15*C. AND -35*C., AND POLYMERIZING THE COLD MIXTURE BY THE APPLICATION THERETO OF A FRIEDEL-CRAFTS ACTIVE METAL HALIDE CATALYST IN SOLUTION IN A LOW FREEZING, NONCOMPLEX FORMING SOLVENT TO PRODUCE A HARD RESIN WHICH IS A NON-ELASTOMER, HAVING A MELTING POINT (BY THE BALL AND RING METHOD) WITHIN THE RANGE BETWEEN 75*C., AND 117*C., AND A VERY LIGHT COLOR.
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |