US2946775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improving the color of petroleum resins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-04-17
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Granted: 1960-07-26
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Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Vries Arthur Douwe De
- 👤 Fred J Buchmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:16
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING RESINS OF IMPROVED COLOR WHICH COMPRISES ISOLATING A STEAM-CRACKED PETROLEUM FRACTION BOILING BETWEEN ABOUT 20 AND 175*C., HEATING THE STEAM-CRACKED FRACTION TO A TEMPERATURE SUFFICIENT TO DIMERIZE SUBSTANTIALLY ALL OF THE CYCLODIENES IN SAID FRACTION, STRIPPING THE RESULTING MIXTURE TO SEPARATE AN OVERHEAD PRODUCT FROM THE DIMERIZED CYCLODIENES, FRACTIONATING THE OVERHEAD PRODUCT TO SEPARATE AT LEAST 50% OF THE PRODUCT BOILING UP TO 38*C., INCLUDING ISOPRENE, RECOVERING A PRODUCT STREAM BOILING BETWEEN ABOUT 20 AND 170*C. AND HAVING THE FOLLOWING COMPOSITION:
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING RESINS OF IMPROVED COLOR WHICH COMPRISES ISOLATING A STEAM-CRACKED PETROLEUM FRACTION BOILING BETWEEN ABOUT 20 AND 175*C., HEATING THE STEAM-CRACKED FRACTION TO A TEMPERATURE SUFFICIENT TO DIMERIZE SUBSTANTIALLY ALL OF THE CYCLODIENES IN SAID FRACTION, STRIPPING THE RESULTING MIXTURE TO SEPARATE AN OVERHEAD PRODUCT FROM THE DIMERIZED CYCLODIENES, FRACTIONATING THE OVERHEAD PRODUCT TO SEPARATE AT LEAST 50% OF THE PRODUCT BOILING UP TO 38*C., INCLUDING ISOPRENE, RECOVERING A PRODUCT STREAM BOILING BETWEEN ABOUT 20 AND 170*C. AND HAVING THE FOLLOWING COMPOSITION:
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |