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:
Oct. 20, 2009
Filed:
Nov. 19, 2007
Applicant:
John D. Summers, Chapel Hill, NC (US);
Inventor:
John D. Summers, Chapel Hill, NC (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 1/00 (2006.01); H01B 1/02 (2006.01); H01B 1/12 (2006.01); C08G 73/10 (2006.01); B22F 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Resistor compositions are disclosed, made from polymer thick film resistor formulations comprising a polyimide component, a sterically hindered hydrophobic epoxy component and a solvent component having a Hanson polar solubility parameter between 2.1 and 3.0 and having a normal boiling point between 210 and 260° C. The weight ratio of polyimide component ('A') to epoxy component ('B') is A:B, where A is between and including 1 to 15 and where B is 1.