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:
Sep. 24, 1991
Filed:
Jun. 13, 1990
Applicant:
Inventor:
Ullrich Demisch, Freiburg i.Br., DE;
Assignee:
Testoterm Messtechnik GmbH & Co., Lenzkirch, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01W / ;
U.S. Cl.
CPC ...
733365 ; 73 2905 ; 361286 ;
Abstract
A capacitive humidity sensor includes a capacitor with two metallic electrodes 12, 15, with electrode 15 formed of a moisture-permeable metallic layer. A moisture-sensitive polymer film 14 situated between the electrodes serves as a dielectric. The film 14 is advantageously chosen to be polyether imide.