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:
Dec. 27, 1994
Filed:
Dec. 30, 1993
Applicant:
Inventor:
David Burgener, Elmhurst, IL (US);
Assignee:
Air Liquide America Corporation, Walnut Creek, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62 85 ; 62292 ; 62303 ;
Abstract
A process for removing lubricant, hydrocarbons and mixtures thereof from a vapor compression mechanical refrigeration system by using carbon dioxide as a solvent is disclosed. The process is carried out using supercritical, liquified or gaseous carbon dioxide and removes lubricant to a level below about 5% so as to be compatible with environmentally acceptable refrigerants.