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:
May. 25, 2004
Filed:
May. 15, 2000
Applicant:
Inventors:
G. Marco Bommarito, Stillwater, MN (US);
Mieczyslaw H. Mazurek, Roseville, MN (US);
Raymond P. Johnston, Lake Elmo, MN (US);
David J. Yarusso, Shoreview, MN (US);
Curtis L. Larson, Hudson, WI (US);
Assignee:
3M Innovative Properties Company, Saint Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01K 5/08 ; G01K 3/04 ; G04F 1/300 ;
U.S. Cl.
CPC ...
G01K 5/08 ; G01K 3/04 ; G04F 1/300 ;
Abstract
The invention provides microstructured time dependent indicators including timers, time/temperature indicators, etc. The indicators are preferably highly accurate and easy to read. The invention also includes indicators which are game pieces, calendars, greeting cards, etc. The indicators function by flow of a material through channels of a microstructured substrate.