US2638412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation of aviation gasoline components
Assignee: Standard Oil Development Co
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Filing: 1951-04-14
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Granted: 1953-05-12
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Expires: 1971-04-14
Abstract
No abstract record available.
Inventors
- 👤 John G Browder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/183; C10L1/1832; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A METHOD FOR REMOVING PENTANES AND LIGHTER FRACTIONS FROM A HYDROCARBON FRACTION SUSCEPTIBLE TO FORMATION OF GUM ON EXPOSURE OF SAME TO AN ELEVATED TEMPERATURE WHICH COMPRISES DISTILLING A HYDROFORMED FRACTION CONSISTING OF A PERDOMINANT AMOUNT OF SATURATED HYDROCARBONS, A LESSER AMOUNT OF AROMATIC HYDROCARBONS, AND A STILL LESSER AMOUNT OF OLEFINIC HYDROCARBONS AND BOILING IN THE RANGE BETWEEN 85* AND 200* F. IN THE PRESENCE OF 0.1 POUND OF 2,6-DI-TERTIARY-
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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |