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:
Jun. 26, 2001
Filed:
Jul. 15, 1998
Applicant:
Inventors:
John A. Ramthun, Hudson, WI (US);
Steven P. Floeder, Arden Hills, MN (US);
Arthur T. Manning, St. Paul, MN (US);
Lanny L. Harklau, Stillwater, MN (US);
Gregory D. Kostuch, Mahtomedi, MN (US);
Jack W. Lai, Lake Elmo, MN (US);
Wenyuan Xu, Oakdale, MN (US);
Assignee:
3M Innovation Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 2/164 ;
U.S. Cl.
CPC ...
G01N 2/164 ;
Abstract
A method and apparatus for measuring the thickness of a coating on a coated surface. The method uses a solid state array of light-sensitive elements to measure light emitted from a fluorescing coating composition. The intensity of the emitted light corresponds to the thickness of the coating composition, and provides a fast and accurate measure of coating thickness.