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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.:

US 5157055 B1

PDFFull Text
Date of Patent:
Oct. 20, 1992

Filed:

Jun. 04, 1991

Cation exchange polyimide resin and use thereof

Applicant:
Inventors:

Yoshiro Akagi, Osaka, JP;

Koji Ohoka, Nara, JP;

Shigeru Kaminishi, Nara, JP;

Hiroshi Taniguchi, Nara, JP;

Hideo Asahina, Tenri, JP;

Hirotaka Ohno, Tenri, JP;

Mariko Ishino, Nara, JP;

Atsuhisa Inoue, Nara, JP;

Yasunari Okamoto, Nara, JP;

Yoshiharu Nakajima, Nara, JP;

Assignee:

Sharp Kabushiki Kaisha, Osaka, JP;

Attorney:

Birch, Stewart, Kolasch & Birch

Primary Examiner:

Joseph L Schofer

Assistant Examiner:

Fred Zitomer

Int. Cl.
CPC ...
C08J / ; C08J / ;
U.S. Cl.
CPC ...
521 25 ; 210660 ; 210661 ; 210681 ; 521 26 ; 521 27 ; 521 32 ; 525420 ; 525424 ; 525436 ; 528353 ;
Abstract

A cation exchange polyimide resin having resistance to organic solvents which contains polyamidocarboxylic acid units providing sites of ion exchange and represented by the formula (I): ##STR1## wherein R.sup.1 is a tetravalent organic group, and R.sup.2 is a bivalent organic group, which is capable of trapping cations from organic solvents.

Find Patent Forward Citations

Akagi, Yoshiro. (1992). Cation exchange polyimide resin and use thereof (U.S. Patent No. 5157055). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5157055

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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