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. 10, 2001
Filed:
Nov. 24, 1998
Applicant:
Inventors:
John Douglas Oakey, Godalming, GB;
Paul Higginbotham, Guildford, GB;
Assignee:
The BOC Group plc, Windlesham, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/00 ; F25J 5/00 ;
U.S. Cl.
CPC ...
F25J 3/00 ; F25J 5/00 ;
Abstract
Nitrogen is produced by separation of it from air. Nitrogen so separated is condensed. Most or all of the nitrogen is separated by rectification. At least some of the condensed nitrogen is employed as reflux in the rectification. The nitrogen is both separated and condensed at three or more different pressures.