Patent US2852440A successfully refreshed from Google Patents.
US2852440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatics and unsaturated hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-06-24
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Granted: 1958-09-16
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Brook I Smith
- 👤 Edward D Boston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:41
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C15/00; C10; C10G; C10G9/00; C10G9/14; C10G9/28; C10G9/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A NON-CATALYTIC PROCESS FOR CRACKING HYDROCARBON OILS TO PRODUCE AROMATICS AND NORMALLY GASEOUS, UNSATURATED ALIPHATIC HYDROCARBONS COMPRISING CONTINUOUSLY HEATING PETROLEUM OIL TO A CRACKING TEMPERATURE IN THE RANGE OT 1200* TO 1700<F. WHILE MAINTAINING A HYDROCARBON PARTIAL PRESSURE OF 30-300 P.S.I.A. FOR A PERIOD OF TIME SUFFICIENT TRO CONVERT 25-50 WT. PERCENT OF SAID TO C3 AND LIGHTER HYDROCARBONS, THEREAFTER REDUCING THE HYDROCARBON PARTIAL PRESSURE BELOW 30 P.S.I.A., MAINTAINING THE OIL SO REDUCED IN PRESSURE WITHIN SAID CRACKING TENPERATURE RANGE FOR A PERIOD SUFFICIENT TO OBTAIN A TOTAL CONVERSION OF SAID OIL OF 35 TO 60WT. PRECENT C3 AND LIGHTER HYDROCARBONS, SAID TOTAL CONVERSION BEING AT LEAST 5% GREATER THAN THE CONVERSION OBTAINED IN THE FIRST ZONE, COOLING THE CRACKED PRODUCTS AND SEPARATING FROM THE COOLED PRODUCTS AROMATICS AND UNSATURATED ALIPHATIC HYDROCARBONS.
Claim 2
Dependent Claim
132 words
A NON-CATALYTIC PROCESS FOR CRACKING HYDROCARBON OILS TO PRODUCE AROMATICS AND NORMALLY GASEOUS, UNSATURATED ALIPHATIC HYDROCARBONS COMPRISING CONTINUOUSLY HEATING PETROLEUM OIL TO A CRACKING TEMPERATURE IN THE RANGE OT 1200* TO 1700<F. WHILE MAINTAINING A HYDROCARBON PARTIAL PRESSURE OF 30-300 P.S.I.A. FOR A PERIOD OF TIME SUFFICIENT TRO CONVERT 25-50 WT. PERCENT OF SAID TO C3 AND LIGHTER HYDROCARBONS, THEREAFTER REDUCING THE HYDROCARBON PARTIAL PRESSURE BELOW 30 P.S.I.A., MAINTAINING THE OIL SO REDUCED IN PRESSURE WITHIN SAID CRACKING TENPERATURE RANGE FOR A PERIOD SUFFICIENT TO OBTAIN A TOTAL CONVERSION OF SAID OIL OF 35 TO 60WT. PRECENT C3 AND LIGHTER HYDROCARBONS, SAID TOTAL CONVERSION BEING AT LEAST 5% GREATER THAN THE CONVERSION OBTAINED IN THE FIRST ZONE, COOLING THE CRACKED PRODUCTS AND SEPARATING FROM THE COOLED PRODUCTS AROMATICS AND UNSATURATED ALIPHATIC HYDROCARBONS.
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |