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:
Sep. 01, 1987
Filed:
Nov. 22, 1985
Applicant:
Inventors:
Hiroshi Makino, Ichihara, JP;
Masayuki Nakatani, Ichihara, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B01D / ;
U.S. Cl.
CPC ...
4284735 ; 55 16 ; 55158 ; 2105001 ; 21050021 ; 21050023 ; 21050039 ; 428220 ;
Abstract
A gas separating material having excellent CO.sub.2 gas permeating property, mechanical property, and heat resistance has a gas separating layer comprising an aromatic imide polymer which contains 20 to 100 molar % of recurring units of the formula (I): ##STR1## wherein A.sub.1 is a tetravalent aromatic radical, A is a divalent aromatic radical of the formula (II): ##STR2## in which R and R.sup.1 are H or an organic radical, for example, --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, or --CH.sub.2 OH, and n is 0, 1, or 2.