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. 08, 1992
Filed:
Jun. 03, 1991
Applicant:
Inventors:
Mitchell R Zakin, Bradford, MA (US);
Lawrence S Bernstein, Lexington, MA (US);
Richard A Moody, Nashua, NH (US);
Assignee:
Spectral Sciences, Inc., Burlington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; H01C / ;
U.S. Cl.
CPC ...
422 98 ; 422 58 ; 422 88 ; 422 90 ; 436902 ; 73 3105 ; 73 3101 ; 338 13 ; 338 34 ;
Abstract
A selective chemical species detector including a conductive polymer based sensing element having a detectable characteristic, for example, the polymer resistivity, permanently altered on exposure to a first chemical species and not permanently altered on exposure to a second chemical species. The detector then determines a permanent change in the detected characteristic and indicates the presence of a chemical species on detection of a such a permanent characteristic change. Also disclosed is a method of fabricating such a sensing element to achieve the desired selectivity.