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US3778415A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparing a monoalkyl aromatic

Assignee: Gulf Research and Development Co
•
Filing: 1971-08-13
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Granted: 1973-12-11
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Expires: 1991-08-13
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Abstract

Abstract AN IMPROVEMENT IN A PROCESS WHEREIN A FIRST COMPOUND AND A SECOND COMPOUND REACT WITH EACH OTHER TO PRODUCE A THIRD COMPOUND AND A FOURTH COMPOUND IN ESSENTIALLY IRREVERSIBLE REACTIONS AND THE SECOND AND FOURTH COMPOUNDS REACT WITH EACH OTHER TO PRODUCE THE THIRD COMPOUND IN EQUILIBRIUM-LIMITED REACTIONS, THE SECOND COMPOUND BEING PRESENT IN THE REACTION MIXTURE IN EXCESS OF THAT REQUIRED FOR THE REACTIONS, AND THE EXCESS AMOUNT OF THE SECOND COMPOUND IS RECYCLED TO THE REACTION ZONE, WHICH INVOLVES REDUCING THE AMOUNT OF THE SECOND COMPOUND IN THE REACTION MIXTURE, INTRODUCING THEREIN THE FOURTH COMPOUND IN AN AMOUNT GREATER THAN WOULD BE PRESENT AT EQUILIBRIUM AND TERMINATING THE PROCESS BEFORE THE REACTION MIXTURE REACHES EQUILIBRIUM.

Inventors

  • 👤 D Ko

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 13:32
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/085; B; B01; B01J; B01J19/00; B01J19/0006; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/949; Y10S585/954

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) 1976-12-10 1977-06-11 1977-12-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-10 1981-06-11 1981-12-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-10 1985-06-11 1985-12-11 $7700.00 Window Closed / Lapsed

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