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:
Mar. 31, 2009
Filed:
Jun. 01, 2004
Richard J. Pokorny, Maplewood, MN (US);
Marc D. Radcliffe, Newport, MN (US);
Steven D. Solomonson, Shoreview, MN (US);
Terence D. Spawn, Stillwater, MN (US);
Richard J. Pokorny, Maplewood, MN (US);
Marc D. Radcliffe, Newport, MN (US);
Steven D. Solomonson, Shoreview, MN (US);
Terence D. Spawn, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Methods of making an optical body include coating a mixture including a first cholesteric liquid crystal polymer, a second cholesteric liquid crystal monomer, a second cholesteric liquid crystal polymer formed from a portion of the second cholesteric liquid crystal monomer, and a solvent on a substrate. The first cholesteric liquid crystal polymer is different than the second cholesteric liquid crystal polymer. Then, forming from the mixture an optical body including a first layer, a second layer, and a third layer disposed between the first and second layer. The first layer includes a majority of the first cholesteric liquid crystal polymer. The second layer includes a majority of a second cholesteric liquid crystal monomer. The third layer includes the second cholesteric liquid crystal polymer.