Patent US3252771A successfully refreshed from Google Patents.
US3252771A
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Hydrocarbon fuel compositions
Assignee: Sinclair Research Inc
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Filing: 1962-02-19
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Granted: 1966-05-24
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Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Clough
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A FUEL OIL COMPOSITION OF IMPROVED POUR POINT CONSISTING ESSENTIALLY OF A DISTILLATE HYDROCARBON FUEL OIL AND A SMALL EFFECTIVE AMOUNT OF AN OIL-SOLUBLE POLYMER OF A NORMAL C16 TO C18 HYDROCARBON ALPHA-OLEFIN, SAID POLYMERIZATION PRODUCT HAVING A MOLECULAR WEIGHT OF ABOUT 1000 TO 20,000, SAID AMOUNT BEING SUFFICIENT TO REDUCE THE POUR POINT OF THE HYDROCARBON FUEL OIL.
Claim 2
Dependent Claim
59 words
A FUEL OIL COMPOSITION OF IMPROVED POUR POINT CONSISTING ESSENTIALLY OF A DISTILLATE HYDROCARBON FUEL OIL AND A SMALL EFFECTIVE AMOUNT OF AN OIL-SOLUBLE POLYMER OF A NORMAL C16 TO C18 HYDROCARBON ALPHA-OLEFIN, SAID POLYMERIZATION PRODUCT HAVING A MOLECULAR WEIGHT OF ABOUT 1000 TO 20,000, SAID AMOUNT BEING SUFFICIENT TO REDUCE THE POUR POINT OF THE HYDROCARBON FUEL OIL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |