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US3732325A Expired / Lapsed US ⏱️ 0.0 years remaining

Hydrocarbon separation process

Assignee: Universal Oil Products Co
•
Filing: 1970-12-28
•
Granted: 1973-05-08
•
Expires: 1990-12-28
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Abstract

Abstract A PROCESS FOR THE SEPARATION OF AROMATIC HYDROCARBONS WHICH PROCESS COMPRISES THE ADSORPTION OF SELECTED FEED COMPONENTS FOLLOWED BY DESORPTION OF SELECTED FEED COMPONENTS FROM A SOLID ADSORBENT THROUGH THE USE OF A DESORBENT MATERIAL. THE PROCESS ALLOWS THE ADSORBENT WHICH HAS JUST CONTACTED FEED STOCK AND WHICH SELECTIVELY ADSORBS A SELECTED COMPONENT THEREFROM TO BE CONTACTED WITH A QUANTITY OF SELECTIVELY ADSORBED FEED COMPONENT TO REMOVE UNDESIRED RAFFINATE COMPONENTS WHICH ARE EITHER ADSORBED BY THE ADSORBENT OR PRESENT WITHIN THE INTERSTITIAL VOID SPACES BETWEEN THE ADSORBENT PARTICLES PRIOR TO RECOVERY OF THE EXTRAT MATERIAL IN A DESORPTION STEP. THE SELECTIVELY ADSORBED FEED COMPONENT CAN BE TAKEN FROM EITHER A PRODUCT EXTRACT STREAM OR DIRECTLY FROM THE PORTION OF THE ADSORBENT IN WHICH THE DESORPTION STEP TAKES PLACE.

Inventors

  • 👤 J Pharis
  • 👤 R Zabransky
  • 👤 D Broughton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 01:12
CPC Classifications
C; C10; C10G; C10G25/00; C07; C07C; C07C7/00; C07C7/12; C07C7/13

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) 1976-05-07 1976-11-06 1977-05-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-07 1980-11-06 1981-05-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-07 1984-11-06 1985-05-08 $7700.00 Window Closed / Lapsed

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