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:
Nov. 06, 2001
Filed:
Jun. 23, 2000
Jean-Pierre Gourbier, Le Plessis Trevise, FR;
Lucien Greter, Le Plessis Trevise, FR;
Abstract
A cryogenic distillation apparatus comprising a system of columns (,) also includes at least one external source of a gas other than a column of the system and means for sending this pressurized gas to the first pump (,) in order to serve as barrier gas for a pump (,) and/or at least one external source (,) of liquid other than a column of the system and means for vaporizing at least one portion of this liquid and for sending the vapour thus formed to the first pump in order to serve as barrier gas and/or means (,) for withdrawing a liquid from a column of the system and for vaporizing at least one portion thereof downstream of the first or of the second pump in order to deliver a barrier gas (,) for the first pump.