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, 1994
Filed:
Feb. 09, 1993
Paul E Parker, Concord, NH (US);
Martin H Fox, Franklin, NH (US);
Robert H Turpin, Franklin, NH (US);
Thomas M Golner, Pewaukee, WI (US);
Other;
Abstract
A high temperature insulation for liquid-filled transformers. This invention is a composite sheet material composed of a substrate saturated with a thermally stable polymeric resin that provides a micro-porous structure. This structure allows dielectric fluid to saturate the electrical insulation material. The insulation materials have a low moisture absorption, and do not generate water when aged during the life of the transformer. The invention improves transformer life expectancy with a cost effective alternate electrical sheet insulation material. This material has better heat aged electrical properties than cellulose, which is presently the most common insulator for liquid filled transformers.