US2672425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of hydrocarbon drying oils
Assignee: Standard Oil Development Co
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Filing: 1950-07-29
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Granted: 1954-03-16
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Expires: 1970-07-29
Abstract
No abstract record available.
Inventors
- 👤 Anthony H Gleason
- 👤 Robert F Leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:04
CPC Classifications
C; C09; C09F; C09F5/00; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/10; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/945
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
A PROCESS FOR PREPARING A DRYING OIL WHICH COMPRISES COPOLYMERIZING A MIXTURE OF FROM 75 TO 85% OF BUTADIENE AND 25 TO 15% OF STYRENE IN 200 TO 300 PARTS OF A HYDROCARBON DILUENT PER 100 PARTS OF MONOMERS AND 20 TO 30 PARTS OF A MEMBER OF THE GROUP CONSISTING OF ALIPHATIC ETHERS OF 4 TO 8 CARBON ATOMS AND CYCLIC DIETHERS OF 4 TO 8 CARBON ATOMS, IN THE PRESENCE OF 0.5 TO 5 PARTS OF FINELY DIVIDED SODIUM AT A TEMPERATURE BETWEEN 40 AND 85* C., CONTINUING THE POLYMERIZATION UNTIL SUBSTANTIALLY 100% CONVERSION IS OBTAINED WHERE A PRODUCT IS OBTAINED WHICH HAS A VISCOSITY SOMEWHAT LESS THAN THAT ULTIMATELY DESIRED, KILLING AND REMOVING THE CATALYST AND THEN HEATING THE PRODUCT IN THE ABSENCE OF AIR AT A TEMPERATURE BETWEEN 175 AND 275* C, UNTIL A DRYING OIL HAVING THE DESIRED VISCOSITY 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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |