Patent US3290275A successfully refreshed from Google Patents.
US3290275A
Expired / Lapsed
US
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Production of polymeric compositions from petroleum fraction
Assignee: Velsicol Chemical LLC
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Filing: 1965-07-26
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Granted: 1966-12-06
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Preston L Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:49
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F240/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE THERMAL PRODUCTION OF A LIGHT COLORED, VEGETABLE OIL-SOLUBLE POLYMERIC COMPOSITION WHICH COMPRISES HEATING A MIXTURE IN THE LIQUID PHASE AT A TEMPERATURE ABOVE 300 AND BELOW 330*C., AND AT A PRESSURE OF MORE THAN 250 POUNDS PER SQUARE INCH IN A SUBSTANTIALLY OXYGEN FREE ATMOSPHERE, SAID MIXTURE CONSISTING SUBSTANTIALLY OF FROM ABOUT 70% TO ABOUT 85% BY WEIGHT OF DIMERS OF ISOPRENE, CIS-PIPERYLENE AND TRANS-PIPERYLENE, AND CODIMERS, TRIMES AND COTRIMERS OF ISOPRENE, CIS-PIPERYLENE, TRANS-PIPERYLENE AND CYCLOPENTADIENE AND FROM ABOUT 15% TO ABOUT 30% BY WEIGHT OF HIGHER POLYMERS OF ISOPRENE, CIS-PIPERYLENE, TRANS-PIPERYLENE AND CYCLOPENADIENE AND HAVING AN INITIAL BOILING POINT RANGE OF FROM ABOUT 90*C. TO ABOUT 150*C. AND A FINAL POINT RANGE OF FROM ABOUT 330*C. TO ABOUT 380*C., AND DISTILLING THE MIXTURE TO RECOVER THE SAID COMPOSITION.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE THERMAL PRODUCTION OF A LIGHT COLORED, VEGETABLE OIL-SOLUBLE POLYMERIC COMPOSITION WHICH COMPRISES HEATING A MIXTURE IN THE LIQUID PHASE AT A TEMPERATURE ABOVE 300 AND BELOW 330*C., AND AT A PRESSURE OF MORE THAN 250 POUNDS PER SQUARE INCH IN A SUBSTANTIALLY OXYGEN FREE ATMOSPHERE, SAID MIXTURE CONSISTING SUBSTANTIALLY OF FROM ABOUT 70% TO ABOUT 85% BY WEIGHT OF DIMERS OF ISOPRENE, CIS-PIPERYLENE AND TRANS-PIPERYLENE, AND CODIMERS, TRIMES AND COTRIMERS OF ISOPRENE, CIS-PIPERYLENE, TRANS-PIPERYLENE AND CYCLOPENTADIENE AND FROM ABOUT 15% TO ABOUT 30% BY WEIGHT OF HIGHER POLYMERS OF ISOPRENE, CIS-PIPERYLENE, TRANS-PIPERYLENE AND CYCLOPENADIENE AND HAVING AN INITIAL BOILING POINT RANGE OF FROM ABOUT 90*C. TO ABOUT 150*C. AND A FINAL POINT RANGE OF FROM ABOUT 330*C. TO ABOUT 380*C., AND DISTILLING THE MIXTURE TO RECOVER THE SAID COMPOSITION.
References Cited (Backward Citations)
US2521022A
Cited
US2817647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |