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US3692667A Expired / Lapsed US ⏱️ 0.0 years remaining

Catalytic cracking plant and method

Assignee: Gulf Research and Development Co
•
Filing: 1969-11-12
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Granted: 1972-09-19
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Expires: 1989-11-12
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Abstract

Abstract WE DISCLOSE A PROCESS FOR CRACKING A PRIMARY HYDROCARBON CHARGE CAPABLE OF BEING CRACKED TO LOWER BOILING CONSTITUENTS INCLUDING PETROCHEMICALS AND THE LIKE IN THE PRESENCE OF A STREAM OF FLUIDIZED CRACKING CATALYST, SAID PROCESS COMPRISING THE STEPS OF MAINTAINING A PREDETERMINED RANGE OF TEMPERATURES WITHIN SAID CATALYST STREAM, ADDING SAID CHARGE TO SAID CATALYST STREAM, RECYCLING AT LEAST A PORTION OF THE NORMALLY LIQUID EFFLUENT PRODUCT OF SAID CRACKING PROCESS TO SAID CATALYST STREAM, AND ADDING SAID RECYCLE PORTION TO SAID CATALYST STREAM AT A POINT HAVING A HIGHER TEMPERATURE THAN THAT AT WHICH SAID CHARGE IS ADDED SO THAT A SIGNIFICANT PROPORTION OF SAID RECYCLE EFFLUENT IS CRACKED BY SAID CATALYST.

Inventors

  • 👤 Joel D Mckinney
  • 👤 George F Ondish

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 07:23
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/187

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1975-09-19 1976-03-20 1976-09-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-19 1980-03-20 1980-09-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-19 1984-03-20 1984-09-19 $7700.00 Window Closed / Lapsed

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