US2624726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of diolefins and aromatics
Assignee: Standard Oil Development Co
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Filing: 1949-12-02
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Granted: 1953-01-06
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Expires: 1969-12-02
Abstract
No abstract record available.
Inventors
- 👤 George E Serniuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:51
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS OF PREPARING A SYNTHETIC RESIN WHICH COMPRISES MIXING A MAJOR PROPORTION OF A BENZENE HYDROCARBON FREE FROM OLEFINIC UNSATURATION WITH A MINOR PROPORTION OF A CONJUGATED DIOLEFIN OF 4 TO 6 CARBON ATOMS, COOLING THE MIXTURE TO A TEMPERATURE BETWEEN 0* C. AND -40 C., AT THE TEMPERATURE GRADUALLY ADDING TO THE MIXTURE A SOLUTION OF ALUMINUM CHLORIDE DISSOLVED IN A LOW FREEZING, INERT, NON-COMPLEX FORMING SOLVENT IN A CONCENTRATION BETWEEN ABOUT 2 AND 3.5 G./100 CC., ALSO ADDING TO THE REACTION MIXTURE ADDITIONAL DIOLEFIN INCREMENTALLY DURING THE COURSE OF THE REACTION UNTIL THE RATIO OF TOTAL DIOLEFIN TO AROMATIC HYDROCARBON REACHES A VALUE BETWEEN 50/50 AND 75/25, AND SEPARATING THE RESULTING HARD RESIN FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
120 words
A PROCESS OF PREPARING A SYNTHETIC RESIN WHICH COMPRISES MIXING A MAJOR PROPORTION OF A BENZENE HYDROCARBON FREE FROM OLEFINIC UNSATURATION WITH A MINOR PROPORTION OF A CONJUGATED DIOLEFIN OF 4 TO 6 CARBON ATOMS, COOLING THE MIXTURE TO A TEMPERATURE BETWEEN 0* C. AND -40 C., AT THE TEMPERATURE GRADUALLY ADDING TO THE MIXTURE A SOLUTION OF ALUMINUM CHLORIDE DISSOLVED IN A LOW FREEZING, INERT, NON-COMPLEX FORMING SOLVENT IN A CONCENTRATION BETWEEN ABOUT 2 AND 3.5 G./100 CC., ALSO ADDING TO THE REACTION MIXTURE ADDITIONAL DIOLEFIN INCREMENTALLY DURING THE COURSE OF THE REACTION UNTIL THE RATIO OF TOTAL DIOLEFIN TO AROMATIC HYDROCARBON REACHES A VALUE BETWEEN 50/50 AND 75/25, AND SEPARATING THE RESULTING HARD RESIN FROM THE REACTION MIXTURE.
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |