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:
Oct. 14, 2025
Filed:
Dec. 29, 2016
Applicant:
L'air Liquide, Societe Anonyme Pour L'etude ET L'exploitation Des Procedes Georges Claude, Paris, FR;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F17C 13/00 (2006.01); F25J 3/04 (2006.01); F25J 3/06 (2006.01);
U.S. Cl.
CPC ...
F17C 13/001 (2013.01); F25J 3/04945 (2013.01); F25J 3/0695 (2013.01); F17C 2203/0391 (2013.01); F17C 2223/0161 (2013.01); F25J 2290/30 (2013.01); F25J 2290/42 (2013.01);
Abstract
A process for establishing vacuum insulation under cryogenic condition and an apparatus compatible with such process are described. When an insulation enclosure filled with high purity COis evacuated to around 100 absolute Pa at ambient temperature, hard vacuum of below 1 absolute Pa may be automatically obtained within the insulation enclosure when temperature drops to around or below −170° C. This process can be employed to provide vacuum insulation for cold box housing air separation units operated under cryogenic condition.