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. 09, 1979
Filed:
Mar. 13, 1978
John S Craven, West Grove, PA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A thermal conductivity cell is provided that is made of cast wafers of ceramic material having a groove in one or both planar abutting surfaces. A filament is mounted in the groove by attachment to the ends of electrical conductors that extend through one of the wafers in sealed relationship. Passageways extend between points in the groove and an exterior surface of the cell. Gaskets are formed on the exterior surface around the openings where the passageways emerge. The gaskets are formed by silk screening and firing one or more layers of thick film conductor paste onto the surface of a layer of thick film conductor paste and at least one superimposed layer of gold and binder.