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. 08, 1996
Filed:
Jun. 06, 1995
Werner Prass, Mainz, DE;
Thomas Stehlin, Hofheim/Taunus, DE;
Yuan Liu, Kawagoe, JP;
Shizuo Ogura, Tsurugashima, JP;
Kenji Motosugi, Kawagoe, JP;
Akihiko Tokida, Kawagoe, JP;
Tetsu Yamamoto, Kawagoe, JP;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
An optical sensor for detecting gaseous or liquid chemical species including a sensing element having a flat light reflecting substrate and one or more transparent thin films which are organic or inorganic films or high-polymer films and are formed on the substrate. The detection of the gaseous or liquid chemical species is effected by measuring a change in the light reflection characteristic of the sensing element based on swelling of the thin film or a change in its thickness or refractive index or changes in both parameters.