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. 31, 2002
Filed:
Dec. 04, 2001
Applicant:
Inventors:
Thomas John Bergman, Jr., Clarence Center, NY (US);
Shanda Gardner Fry, Wheatfield, NY (US);
Jeremy Michael Cabral, Kenmore, NY (US);
Assignee:
Praxair Technology, Inc., Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/00 ;
U.S. Cl.
CPC ...
F25J 3/00 ;
Abstract
A system for producing high and ultra high purity nitrogen comprising a first column for the production of nitrogen and a second column having a top condenser wherein boil off from the second column top condenser is turboexpanded to generate refrigeration for the system.