The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 1991
Filed:
Apr. 03, 1990
Applicant:
Inventor:
Harry Cheung, Buffalo, NY (US);
Assignee:
Union Carbide Industrial Gases Technology Corporation, Danbury, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25J / ; F25J / ;
U.S. Cl.
CPC ...
62 38 ; 62 18 ; 62 24 ; 62 25 ; 62 26 ; 62 44 ;
Abstract
A cryogenic air separation method for the production of oxygen and medium pressure nitrogen comprising a primary higher pressure column and an auxiliary smaller lower pressure stripping column wherein primary column bottom liquid is employed as stripping column downflow liquid and primary column top vapor condenses against stripping column bottom liquid to generate stripping vapor.