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:
Jun. 09, 2015
Filed:
Apr. 23, 2013
Central Glass Company, Limited, Ube-shi, Yamaguchi, JP;
Central Glass Company, Limited, Ube-shi, JP;
Abstract
A gas separation membrane having a polyimide structure. The polyimide structure is provided to contain a repeating unit represented by general formula (1): (In the formula, Ris a single bond, an oxygen atom, a sulfur atom, —SO— group, —CH— group, —C(═O)— group, —C(CH)— group, —C(CH)(CHCH)— group, —C(CF)— group or a divalent organic group formed by removing any two hydrogen atoms from a C-Calicyclic hydrocarbon or C-Caromatic hydrocarbon. Ris a C-Calkyl group. 'ac' and 'ad' mutually independently represent an integer of 0 to 2 such that 1≦ac+ad≦4. HFIP represents a —C(CF)OH group. A straight line that intersects with a wiggly line represents a bonding moiety).