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:
Jul. 28, 1992
Filed:
Jun. 24, 1991
Applicant:
Inventors:
John R Bianchi, East Amherst, NY (US);
Dante P Bonaquist, Grand Island, NY (US);
Richard A Victor, Grand Island, NY (US);
Assignee:
Union Carbide Industrial Gases Technology Corporation, Danbury, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25J / ; C01B / ;
U.S. Cl.
CPC ...
62 22 ; 62 24 ; 423262 ;
Abstract
A cryogenic rectification method employing rectification over a defined height within the lower pressure column of a double column system which reduces the nitrogen concentration of an argon, nitrogen, oxygen mixture while maintaining the argon concentration at or near its maximum enabling production of nitrogen-free argon directly from the argon column system.