US3013088A
Expired / Lapsed
US
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Preparation and separation of xylenes from naphthenic streams
Assignee: Phillips Petroleum Co
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Filing: 1957-12-12
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Granted: 1961-12-12
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Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 George E Merryfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:34
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/067; C07C15/08; C10; C10G; C10G35/00; C10G35/04; C10G2300/00; C10G2300/10; C10G2300/1096; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A PROCESS COMPRISING SEPARATELY CATALYTICALLY REFORMING SELECTED LOWER AND HIGHER BOILING RANGE FRACTIONS OF A NAPHTHENIC STREAM UNDER OPTIMUM XYLENE-FORMING CONDITIONS, SAID NAPHTHENIC STREAM SELECTED FROM THE GROUP CONSISTING OF VIRGIN AND CRACKED NAPHTHAS, SAID LOWER BOILING RANGE FRACTION BOILING IN THE RANGE OF ABOUT 180*F. TO 270*F., SAID HIGHER BOILING RANGE FRACTION BOILING IN THE RANGE OF ABOUT 270*F. TO 400*F. AND BEING REFORMED UNDER RELATIVELY MILDER REACTION CONDITIONS COMPRISING HIGHER PRESSURES THAN ARE EMPLOYED IN REFORMING SAID LOWER BOILING RANGE FRACTION, SAID OPTIMUM CONDITIONS
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |