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:
Jun. 25, 1991
Filed:
Jun. 01, 1990
Applicant:
Inventors:
John B Saunders, Grand Island, NY (US);
James J Maloney, Tonawanda, 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 28 ; 62 42 ;
Abstract
A cryogenic nitrogen rejection unit with improved methane recovery wherein higher quality nitrogen reflux is generated by successive vapor partial condensations and the nitrogen is introduced into a separation column preferably in a cascade fashion.