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. 13, 1999
Filed:
Nov. 22, 1996
Applicant:
Inventor:
Takao Yamamoto, Hyogo-ken, JP;
Assignee:
Teisan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62643 ; 62900 ;
Abstract
A method for producing a small amount of oxygen, related to a nitrogen generator unit, is provided. In a nitrogen rectification column which cools down and liquefies feed air after moisture and carbon dioxide contained therein are removed, thereby producing nitrogen, oxygen-rich liquid air is used as a cold source for a nitrogen condenser and the thus-obtained oxygen-rich air is then used as a heating source for a reboiler in an oxygen rectification column.