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:
Nov. 29, 2011
Filed:
Jul. 09, 2007
Hideo Suzuki, Funabashi, JP;
Takayuki Tamura, Funabashi, JP;
Yoshikazu Ootsuka, Funabashi, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
A polyamic acid comprising at least 10 mol % repeating units represented by the formula [1] or [2]; and a polyimide represented by the formula [3] or [4] which is obtained from the polyamic acid. A polyimide film having high heat resistance and satisfactory in light-transmitting properties and tensile strength is obtained from the polyamic acid. (In the formulae, Rand Reach independently represents hydrogen or Calkyl; Rand Reach independently represents hydrogen, halogeno, Calkyl, or phenyl or the Rand Ron adjoining carbon atoms are bonded to each other to form Ccycloalkyl or phenyl; Rrepresents a divalent organic group; and n is an integer of 2 or larger.)