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:
Aug. 31, 1993
Filed:
Jul. 02, 1991
Applicant:
Inventors:
Christian Barbe, Paris Cedex, FR;
Dominique Masurel, Paris Cedex, FR;
Assignee:
L'Air Liquide, Paris Cedex, FR;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
95 54 ; 55267 ; 96 10 ;
Abstract
A cascade-sweep process is provided for producing nitrogen gas from air, using a plurality of stages of membrane units each containing a plurality of hollow fiber membranes, at least one of the plurality of membrane units containing a sweep input to inject a sweep gas longitudinally on the external surface of the hollow fiber membranes.