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:
Sep. 05, 2000
Filed:
Dec. 03, 1998
Applicant:
Inventors:
Edward W Kifer, Trafford, PA (US);
James R Kwiecinski, Delmont, PA (US);
Assignee:
Ranbar Electrical Materials, Inc., Manor, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
528353 ; 528125 ; 528128 ; 528172 ; 528173 ; 528176 ; 528179 ; 528183 ; 528185 ; 528220 ; 528229 ; 528350 ; 428375 ; 428379 ; 428394 ; 428395 ; 428615 ;
Abstract
A fully imidized cresylic acid soluble polymer comprising 4,4'- oxydiphthalic anhydride (ODPA), 3,4,3',4',-biphenyltetracarboxylic dianhydride (BPDA), 3,4'-oxydianiline (ODA), and 4,4'-oxydianiline (DAPE) that can be used as a coating material such as a wire coated enamel. The polyimide has relatively low viscosity and high percent solids by substituting some of the 3,4'oxydianiline with 4,4'oxydianiline. Substitution with the 4,4'oxydianiline can be accomplished up to 25% on the molar basis without losing the fully imidized, cresol solubility characteristics.