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. 10, 1991
Filed:
Aug. 13, 1990
Applicant:
Inventors:
Rene Avrillon, Maison Laffite, FR;
Andre Deschamps, Noisy le Roi, FR;
Alain Driancourt, Bourg la Reine, FR;
Jean-Claude Mileo, Saint Ismier, FR;
Eric Robert, Rueil Malmaison, FR;
Assignee:
Institut Francais du Petrole, Rueil Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
55 16 ; 55 68 ; 55158 ;
Abstract
Disclosed is a gas separation membrane, comprising a film with a thickness ranging from 0.05.10.sup.-6 to 20.10.sup.-6 m, at least 90% by mole of which is at least one aromatic polyimide or copolyimide, the recurrent unit of which corresponds to the following formula (I): ##STR1## where A represents a tetravalent aromatic radical at least 50% by mole of which are represented by the following formula (II): ##STR2## and B represents a bivalent aromatic radical or a mixture of bivalent aromatic radicals.