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:
Mar. 08, 1994
Filed:
Jul. 31, 1992
Applicant:
Inventors:
Francois Camberlein, Paris, FR;
Jean-Louis Girault, Liege, BE;
Philippe Mazieres, Montfermeil, FR;
Jean-Pierre Tranier, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 22 ; 62 41 ;
Abstract
The apparatus is of the type having a double column and a mixing column. The latter is fed at the bottom portion with auxiliary air that is compressed at a pressure different from that of the mean pressure column, and at the top by means of a liquid withdrawn from the bottom of the low pressure column and pumped at the same pressure as the auxiliary air. Impure oxygen is withdrawn at the top of the mixing column as production gas, and substantially pure oxygen is produced at the bottom of the low pressure column.