US3271121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-styrene copolymer as pour point depressant
Assignee: Sinclair Research Inc
•
Filing: 1963-03-14
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Granted: 1966-09-06
•
Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 George A Uhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/165; C08; C08F; C08F10/00; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A HYDROCARBON FUEL OIL DISTILLATE BOILING PRIMARILY IN THE RANGE OF ABOUT 300* TO 750* F. CONTAINING A SMALL AMOUNT OF A MINERAL OIL-SOLUBLE POLYMER OF ABOUT 10 TO 90% BY WEIGHT STYRENE AND ABOUT 10 TO 90% BY WEIGHT ETHYLENE, SAID COPOLYMER HAVING A STAUDINGER MOLECULAR WEIGHT OF ABOUT 1,000 TO 40,000 AND BEING PREPARED BY SUBJECTING SAID STYRENE AND SAID ETHYLENE TO A GAMMA RAY DOSAGE OF AT LEAST ABOUT 5,000,000 ROENTGENS TO OBTAIN SAID OIL-SOLUBLE PRODUCT AND SAID AMOUNT BEING SUFFICIENT TO PROVIDE THE OIL WITH A REDUCED POUR POINT.
Claim 2
Dependent Claim
93 words
A HYDROCARBON FUEL OIL DISTILLATE BOILING PRIMARILY IN THE RANGE OF ABOUT 300* TO 750* F. CONTAINING A SMALL AMOUNT OF A MINERAL OIL-SOLUBLE POLYMER OF ABOUT 10 TO 90% BY WEIGHT STYRENE AND ABOUT 10 TO 90% BY WEIGHT ETHYLENE, SAID COPOLYMER HAVING A STAUDINGER MOLECULAR WEIGHT OF ABOUT 1,000 TO 40,000 AND BEING PREPARED BY SUBJECTING SAID STYRENE AND SAID ETHYLENE TO A GAMMA RAY DOSAGE OF AT LEAST ABOUT 5,000,000 ROENTGENS TO OBTAIN SAID OIL-SOLUBLE PRODUCT AND SAID AMOUNT BEING SUFFICIENT TO PROVIDE THE OIL WITH A REDUCED POUR POINT.
References Cited (Backward Citations)
US2563631A
Cited
US2746925A
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US2814595A
Cited
US3018236A
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US2996455A
Cited
US2982730A
Cited
US3117945A
Cited
US3112297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |