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:
Dec. 04, 2012
Filed:
Mar. 02, 2009
Applicants:
Abolghassem B. Mahmoodi, Saint Paul, MN (US);
Milind Balwant Sabade, Woodbury, MN (US);
Ai-ping Wei, Woodbury, MN (US);
Inventors:
Abolghassem B. Mahmoodi, Saint Paul, MN (US);
Milind Balwant Sabade, Woodbury, MN (US);
Ai-Ping Wei, Woodbury, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/55 (2006.01); G01N 33/03 (2006.01); G01N 33/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
Herein are disclosed methods and devices for evaluating the quality of oils (e.g., cooking oil or flying oil). The methods can provide an indication of the free fatty acid content of the oil. The methods use an optical interrogation device to provide an indication of free fatty acid based on quantitative measurements of optical reflectance from test zones on a sampling substrate.