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. 16, 2007
Filed:
Sep. 03, 2002
Christian Depeursinge, Preverenges, CH;
Daniel Salzmann, Les Genevez, CH;
Christian Depeursinge, Preverenges, CH;
Daniel Salzmann, Les Genevez, CH;
Linde Medical Sensors AG, Basel, CH;
Abstract
The sensor system for the detection of chemical substances has a spiral optical waveguide which produces an evanescent field penetrating into the adjacent medium, a light source for coupling light into the waveguide, and a detecting circuit for receiving light from the waveguide and producing an output signal reflecting the sensed chemical substance. The waveguide has the form of a bifilar, non-crossing spiral. It consists of an incoming or decreasing spiral segment and an outgoing or increasing spiral segment continuously bound by a central semi-circular segment.