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:
Jan. 31, 1995
Filed:
Sep. 10, 1993
Walter Gumbrecht, Herzogenaurach, DE;
Wolfgang Schelter, Uttenreuth, DE;
Bernhard Montag, Forchheim, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A planar reference electrode for chemical sensors, which are able to be supplied with a measuring fluid and a calibrating fluid. The planar reference electrode has the following components: an internal reference element situated on a flat substrate; a layer covering the substrate in the vicinity of the internal reference element and consisting of a structured polymer and having at least one trench, which serves as a diffusion channel and extends in the lateral direction from the internal reference element to a region that comes in contact with the measuring fluid or calibrating fluid to be supplied to the chemical sensor, where the diffusion in the diffusion channel is determined by the channel geometry and/or by a diffusion layer; and a covering which seals off the trench.