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:
Mar. 24, 1992
Filed:
Jan. 22, 1991
Applicant:
Inventors:
Harry Cheung, Williamsville, NY (US);
Dante P Bonaquist, Grand Island, NY (US);
Assignee:
Union Carbide Industrial Gases Technology Corporation, Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 24 ; 62 33 ; 62 41 ;
Abstract
A method and apparatus for producing elevated pressure nitrogen with improved recovery comprising a primary column and a lower pressure auxiliary column wherein auxiliary column top vapor is condensed, pressurized and passed into the primary column.