US2676933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature copolymerization of diolefins, olefins, and aromatic compounds
Assignee: Standard Oil Development Co
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Filing: 1949-12-02
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Granted: 1954-04-27
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Expires: 1969-12-02
Abstract
No abstract record available.
Inventors
- 👤 George E Serniuk
- 👤 John D Garber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:25
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PREPARATION OF A RESINOUS POLYMER WHICH COMPRISES MIXING BUTADIENE, ISOBUTYLENE AND TOLUENE IN A RATIO OF 60/20/20, DILUTING THE MIXTURE WITH METHYL CHLORIDE, COOLING THE DILUTED SOLUTION TO A TEMPERATURE BETWEEN 0* C. AND -40* C., ADDING THERETO 10% BY WEIGHT BASED ON THE FEED OF ALUMINUM CHLORIDE CATALYST DISSOLVED IN ETHYL CHLORIDE IN A CONCENTRATION BETWEEN 0.1 AND 5% AND SEPARATING THE RESULTING RESIN FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PREPARATION OF A RESINOUS POLYMER WHICH COMPRISES MIXING BUTADIENE, ISOBUTYLENE AND TOLUENE IN A RATIO OF 60/20/20, DILUTING THE MIXTURE WITH METHYL CHLORIDE, COOLING THE DILUTED SOLUTION TO A TEMPERATURE BETWEEN 0* C. AND -40* C., ADDING THERETO 10% BY WEIGHT BASED ON THE FEED OF ALUMINUM CHLORIDE CATALYST DISSOLVED IN ETHYL CHLORIDE IN A CONCENTRATION BETWEEN 0.1 AND 5% AND SEPARATING THE RESULTING RESIN FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
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US2438340A
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US2479450A
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US2497458A
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US2476000A
Cited
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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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |