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:
Jan. 13, 2004
Filed:
Aug. 10, 2000
James E. Lasch, Oakdale, MN (US);
Paul J. Wang, Woodbury, MN (US);
Raymond L. Lucking, Hastings, MN (US);
Terry R. Bailey, Woodbury, MN (US);
Kanta Kumar, Maplewood, MN (US);
Michael A. Essien, Woodbury, MN (US);
Jeffrey D. Janovec, River Falls, WI (US);
Jaime R. Ojeda, Woodbury, MN (US);
Michael D. Currens, Eagan, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Retroreflective articles having multilayer films are useful for commercial graphics and retroreflective products, such as roll-up signs for highway transportation safety. The articles comprise multilayer films having at least one layer of polyurethane and at least one layer of a copolymer of alkylene and at least one non-acidic, polar co-monomer. Articles having the new multilayer films provide the same or improved performance, are less expensive, and offer improved methods for manufacturing, when compared to prior articles.