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. 28, 2013
Filed:
Sep. 16, 2008
Yuki Honda, Hitachi, JP;
Tomiya Abe, Hitachi, JP;
Hideyuki Kikuchi, Hitachi, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Hitachi Magnet Wire Corp., Ibaraki, JP;
Abstract
An insulated wire including a conductor, and an insulating film formed by coating and baking an insulating varnish on the conductor directly or via another insulation layer. The insulating varnish includes a phenolic hydroxyl group-containing polyimide resin represented by a chemical formula (1): where X is a tetravalent aromatic group composing an aromatic tetracarboxylic dianhydride residue, Yis a divalent aromatic group including one or more phenolic hydroxyl groups and Yis a divalent aromatic group not including a phenolic hydroxyl group A ratio of the number Z1 of phenolic hydroxyl groups included in Yof the chemical formula (1) to the number Z2 of an imide group included in the chemical formula (1) is 0.15≦Z1/Z2≦0.85.