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:
Apr. 09, 1996
Filed:
Mar. 01, 1995
Applicant:
Inventors:
Bernard Darredeau, Sartrouville, FR;
Jean-Marc Peyron, Creteil, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 21 ; 62 22 ; 62 24 ; 62 37 ;
Abstract
During restarting an argon column (2), two valves (15, 17) provided at the output of a pump (3) are controlled while maintaining a constant level in the base of the argon column, at the outset at a predetermined first control level (N2), then while progressively lowering the controlled value of the constant level. Use in installations for air distillation whose argon column, of the packed type, has a sufficient height to purify the argon of oxygen to an oxygen content less than 100 ppm.