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:
Apr. 02, 2013
Filed:
Aug. 17, 2011
Chester L. Sandberg, Palo Alto, CA (US);
Chester L. Sandberg, Palo Alto, CA (US);
Other;
Abstract
A three-terminal device () which can operate as an electrical switch, controlled by a third terminal (A) that controls switching the device () from a closed circuit (conducting) state to an open circuit (insulating) state. Polymer and/or ceramic materials are loaded with different conductive materials, forming a device () having various electrical conductivities depending on local temperature. In preferred embodiments, the device () exhibits a non-linear increase or decrease in resistance versus temperature. Various embodiments of the three-terminal devices () are disclosed. The third terminal (A) may be a non-electrically conductive biasing element such as a thermal transfer rod or tube containing a variable temperature fluid.