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. 03, 1999
Filed:
Jan. 14, 1997
Applicant:
Inventor:
Makoto Murata, Saitama, JP;
Assignee:
Hoechst Japan Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528327 ; 528125 ; 528128 ; 528171 ; 528183 ; 528185 ; 528186 ; 528188 ; 528219 ; 528220 ; 528228 ; 528229 ; 528310 ; 528331 ; 5283393 ; 528341 ; 528342 ; 528352 ;
Abstract
An improved polybenzimidazole wherein the total concentration of metals other than alkali metal and alkaline earth metals is 10 ppm or less. The resulting polybenzimidazole is industrially useable in parts or components of apparatus for the manufacture of semiconductors and display devices.