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. 02, 2014
Filed:
Mar. 29, 2011
Gary E. Dwyer, Mallorytown, CA;
Thomas W. Holmquist-brown, Hastings, MN (US);
Kiran S. Kanukurthy, Cottage Grove, MN (US);
Neal A. Rakow, Woodbury, MN (US);
Gary E. Dwyer, Mallorytown, CA;
Thomas W. Holmquist-Brown, Hastings, MN (US);
Kiran S. Kanukurthy, Cottage Grove, MN (US);
Neal A. Rakow, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A filter system includes a housing, a filter medium disposed within the housing and a optical analyte sensor also disposed within the housing in fluid communication with the filter medium. The optical analyte sensor includes a detection medium that changes at least one of its optical characteristics in response to an analyte. The filter system further includes an optical reader having at least one light source and at least one detector. The optical reader is attached to the housing such that at least a portion of light emitted by at least one light source is reflected from the optical analyte sensor and captured by at least one detector.