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:
May. 10, 2016
Filed:
Oct. 28, 2009
Tetsuji Hirano, Chiba, JP;
Toru Kidosaki, Chiba, JP;
Tetsuji Hirano, Chiba, JP;
Toru Kidosaki, Chiba, JP;
UBE INDUSTRIES, LTD., Yamaguchi, JP;
Abstract
A first polyimide precursor solution composition contains: (A) a polyamic acid; (B) a carboxylic acid compound having at least three pairs of carboxyl groups within its molecule or an esterified product thereof; and (D) a solvent. A second polyimide precursor solution composition contains the components (A), (B), and (D) of the first polyimide precursor solution composition and additionally containing (C) a carboxylic acid compound having two pairs of carboxyl groups within its molecule or an esterified product thereof. A third polyimide precursor solution composition contains the components of the second polyimide precursor solution composition, wherein the polyamic acid (A) is a polyamic acid having a specific structure.