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:
Aug. 07, 2007
Filed:
Nov. 16, 2004
Applicants:
Paul E. Marecki, Stillwater, MN (US);
James G. Mitchell, Oakdale, MN (US);
Inventors:
Paul E. Marecki, Stillwater, MN (US);
James G. Mitchell, Oakdale, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/128 (2006.01);
U.S. Cl.
CPC ...
Abstract
A retroreflective article having at least one valve is disclosed. Each valve may include a channel extending from a first major surface to a second major surface of the retroreflective material, and at least one movable member proximate the channel. The at least one movable member is movable between a closed position and an open position. When in the closed position, the at least one movable member obstructs at least a portion of the channel. A method of making a retroreflective article having at least one valve is also disclosed.