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:
Oct. 22, 1991
Filed:
Jul. 05, 1989
Applicant:
Inventor:
David J Kamrath, Asbury, NJ (US);
Assignee:
The BOC Group, Inc., New Providence, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 11 ; 62 40 ;
Abstract
An improved nitrogen generator having a distillation column for separating oxygen and nitrogen, the column having a top and a bottom and a rising vapor stream and a descending liquid stream in countercurrent contact with each other, the improvement comprising means for introducing an amount of liquid nitrogen into the column at an intermediate point in the column wherein the liquid stream composition at said point is substantially equivalent to the liquid nitrogen composition and a means for withdrawing a substantially equivalent amount of purified liquid nitrogen from the top of the column.