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. 04, 2012
Filed:
Mar. 02, 2009
Ai-ping Wei, Woodbury, MN (US);
Milind Balwant Sabade, Woodbury, MN (US);
Abolghassem B. Mahmoodi, Saint Paul, MN (US);
Ai-Ping Wei, Woodbury, MN (US);
Milind Balwant Sabade, Woodbury, MN (US);
Abolghassem B. Mahmoodi, Saint Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Herein are disclosed methods and devices for optically monitoring multiple parameters of an oil sample. In one embodiment, the methods and devices can be used for determining the quality of cooking or flying oil in terms of the free fatty acid content and total polar compound content of the oil. The methods use an optical absorbtive/reflective property in evaluating the free fatty acid content, and use optical fluorescence in evaluating the total polar compound content, with both measurements using a single sampling substrate and a single measuring device.