Patent US2843531A successfully refreshed from Google Patents.
US2843531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high molecular weight aromatics
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-07-15
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Granted: 1958-07-15
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Expires: 1974-07-15
Abstract
No abstract record available.
Inventors
- 👤 Hampton G Corneil
- 👤 Edward F Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:49
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD FOR PREPARING A FRACTION CONSISTING ESSENTIALLY OF CYCLIC COMPOUNDS INCLUDING THE STEPS OF CATALYTICALLY CRACKING A PETROLEUM GAS OIL FRACTION AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 800* TO 1100*F. TO PRODUCE A PRODUCT, DISTILLING SAID PRODUCT TO SEPARATE THEREFROM A DISTILLATE FRACTION BOILING ABOVE 650*F., CONTACTING A CHARGE STREAM CONSISTING OF SAID DISTILLATE FRACTION WITH LIQUEFIED NORMALLY GASEOUS HYDROCARBON TO SEPARATE AN ASPHALT FRACTION THEREFROM CONTAINING CYCLIC AND NON-CYCLIC COMPONENTS AND DISTILLING A CHARGE STREAM CONSISTING OF SAID SEPARATED ASPHALT FRACTION TO RECOVER A DISTILLATE FRACTION CONSISTING ESSENTIALLY OF CYCLIC COMPOUNDS.
Claim 2
Independent Claim
95 words
A METHOD FOR PREPARING A FRACTION CONSISTING ESSENTIALLY OF CYCLIC COMPOUNDS INCLUDING THE STEPS OF CATALYTICALLY CRACKING A PETROLEUM GAS OIL FRACTION AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 800* TO 1100*F. TO PRODUCE A PRODUCT, DISTILLING SAID PRODUCT TO SEPARATE THEREFROM A DISTILLATE FRACTION BOILING ABOVE 650*F., CONTACTING A CHARGE STREAM CONSISTING OF SAID DISTILLATE FRACTION WITH LIQUEFIED NORMALLY GASEOUS HYDROCARBON TO SEPARATE AN ASPHALT FRACTION THEREFROM CONTAINING CYCLIC AND NON-CYCLIC COMPONENTS AND DISTILLING A CHARGE STREAM CONSISTING OF SAID SEPARATED ASPHALT FRACTION TO RECOVER A DISTILLATE FRACTION CONSISTING ESSENTIALLY OF CYCLIC COMPOUNDS.
References Cited (Backward Citations)
US2700637A
Cited
US2731506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |