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. 05, 1977
Filed:
Apr. 09, 1975
Applicant:
Inventor:
Lawrence E Frazee, Norfolk, NB (US);
Assignee:
Plessey Incorporated, Melville, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427125 ; 252514 ; 252519 ; 338 35 ; 427126 ; 427287 ; 427380 ; 4273 / ;
Abstract
A novel humidity sensor printed and fired on a dielectric substrate comprising an interdigitated pattern of a conductive precious metal with cobalt oxide as the only binder. Sensors according to the invention may be employed as hermeticity detectors in semiconductor packages.