Patent US2582693A successfully refreshed from Google Patents.
US2582693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of conjugated diolefins
Assignee: Standard Oil Development Co
•
Filing: 1947-01-02
•
Granted: 1952-01-15
•
Expires: 1967-01-02
Abstract
No abstract record available.
Inventors
- 👤 Anthony H Gleason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:02
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE PROCESS OF PREPARING AN OILY TO RESINOUS POLYMERIZATION PRODUCT WHICH CONSISTS OF MIXING A DIOLEFIN OF THE GROUP CONSISTING OF BUTADIEND-1,3 AND PIPERYLENE WITH FROM 20 TO 50 WEIGHT PERCENT, BASED ON THE MONOMERIC DIOLEFIN, OF A DILUENT SELECTED FROM THE GROUP CONSISTING OF THE CYCLIC DIMER OF BUTADIENE-1,3 AND THE CYCLIC DIMER OF PIPERYLENE, HEATING THE RESULTING MIXTURE AT A TEMPERATURE BETWEEN 130* AND 200* C. UNTIL A SUBSTANTIAL PROPORTION OF THE MONOMERIC DIOLEFIN IS CONVERTED TO DIMER, THEREAFTER HEATING THE TOTAL RESULTING DIMERIZED REACTION MIXTURE TO A TEMPERATURE BETWEEN 250* AND 400* C. AND MAINTAINING THIS TEMPERATURE UNTIL AN OILY TO RESINOUS PRODUCT IS OBTAINED.
Claim 2
Dependent Claim
108 words
THE PROCESS OF PREPARING AN OILY TO RESINOUS POLYMERIZATION PRODUCT WHICH CONSISTS OF MIXING A DIOLEFIN OF THE GROUP CONSISTING OF BUTADIEND-1,3 AND PIPERYLENE WITH FROM 20 TO 50 WEIGHT PERCENT, BASED ON THE MONOMERIC DIOLEFIN, OF A DILUENT SELECTED FROM THE GROUP CONSISTING OF THE CYCLIC DIMER OF BUTADIENE-1,3 AND THE CYCLIC DIMER OF PIPERYLENE, HEATING THE RESULTING MIXTURE AT A TEMPERATURE BETWEEN 130* AND 200* C. UNTIL A SUBSTANTIAL PROPORTION OF THE MONOMERIC DIOLEFIN IS CONVERTED TO DIMER, THEREAFTER HEATING THE TOTAL RESULTING DIMERIZED REACTION MIXTURE TO A TEMPERATURE BETWEEN 250* AND 400* C. AND MAINTAINING THIS TEMPERATURE UNTIL AN OILY TO RESINOUS PRODUCT IS OBTAINED.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |