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, 2012
Filed:
Aug. 21, 2007
Applicants:
William J. Buttner, Merritt Island, FL (US);
Joseph R. Stetter, Hayward, CA (US);
Inventors:
William J. Buttner, Merritt Island, FL (US);
Joseph R. Stetter, Hayward, CA (US);
Assignee:
KWJ Engineering, Newark, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/01 (2006.01);
U.S. Cl.
CPC ...
Abstract
Chemical sensors whose active element exhibits both a visual change in color and a measurable change in electrical resistance when exposed to an analyte to which it selectively reacts are provided. These sensor have several unique features including vastly improved stability measured in years, irreversible visual changes and surprisingly reversible electrical changes. The combined unique features enable a new generation of ultra low power alerting, alarming and readout devices for hydrazines and other strongly reducing chemicals.