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US3655813A Expired / Lapsed US ⏱️ 0.0 years remaining

Continuous alkylation process

Assignee: Sunoco Inc
•
Filing: 1969-06-05
•
Granted: 1972-04-11
•
Expires: 1989-06-05
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Abstract

Abstract OLEFIN-PARAFFIN ALKYLATE IS CONTINUOUSLY PRODUCED BY CONTACTING IN THE LIQUID PHASE A C3-C9 MONOOLEFIN WITH A C4-C6 ISOPARAFFIN IN THE PRESENCE OF A SUBSTANTIALLY ANHYDROUS CYRSTALLINE ALUMINO-SILICATE ZEOLITE, CONTINUOUSLY FEEDING MONOOLEFIN AND ISOPARAFFIN AND WITHDRAWING REACTION PRODUCT AT THE SAME RATE, WHILE ALLOWING SAID CATALYST TO REMAIN INTACT WITHIN THE SYSTEM FOR A PERIOD LESS THAN ABOUT 60 HOURS BEFORE CONTINUOUSLY FEEDING ACTIVE CATALYST AND WOTHDRAWING AGED CATALYST FROM THE SYSTEM AT THE SAME RATE. THE AGED CATALYST IS THEN REGENERATED BY SUBJECTING IT TO A REGENERANT SELECTED FROM THE GROUP CONSISTING OF AIR, AN INERT GAS, INERT SORBATE, OR MIXTURES THEREOF, AND IS ULTIMATELY REACTIVATED.

Inventors

  • 👤 Francis W Kirsch
  • 👤 John D Potts
  • 👤 David S Barmby

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 00:17
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2/60; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/10; C07C2527/11; C07C2527/12; C07C2527/1206; C07C2529/00; C07C2529/04; C07C2529/06; C07C2531/00; C07C2531/02

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) 1975-04-11 1975-10-11 1976-04-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-11 1979-10-11 1980-04-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-11 1983-10-11 1984-04-11 $7700.00 Window Closed / Lapsed

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