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:
Apr. 05, 2016
Filed:
Sep. 27, 2012
Applicant:
Sentient Technologies, Inc., Los Gatos, CA (US);
Inventors:
Mark Bain, Mountain View, CA (US);
Frederick Quincy Johnson, Pleasanton, CA (US);
Assignee:
Sentient Technologies, Inc., Los Gatos, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F 19/00 (2006.01); G01N 27/414 (2006.01);
U.S. Cl.
CPC ...
G01N 27/4148 (2013.01);
Abstract
An ion meter is calibrated by providing two ISFETS with different areas, where the two gate areas are used to calibrate the two ISFETS with respect to one another. The use of two ISFET gates that can be calibrated with respect to one another eliminates the need for an ion meter to be recalibrated before every use, and allows the ion meter to measure the concentration in the solution over an extended period of time.