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:
Feb. 24, 2009
Filed:
Aug. 08, 2003
Robert Hammond-smith, Hampshire, GB;
John Patrick, Dorset, GB;
Rodney Riddle, Dorset, GB;
Matthias Kuntz, Seeheim-Jugenheim, DE;
Michael Ukelis, Riedstadt, DE;
Peter Schmitt, Wuerzburg, DE;
Siegfried Schmitzer, Kuernach, DE;
Robert Hammond-Smith, Hampshire, GB;
John Patrick, Dorset, GB;
Rodney Riddle, Dorset, GB;
Matthias Kuntz, Seeheim-Jugenheim, DE;
Michael Ukelis, Riedstadt, DE;
Peter Schmitt, Wuerzburg, DE;
Siegfried Schmitzer, Kuernach, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
The invention relates to a method of preparing a birefringent marking by printing a polymerisable liquid crystal material onto at least one side of a substrate and polymerising the liquid crystal material, to a birefringent marking obtained by this method, and to the use of the birefringent marking for decorative, security, authentification and identification applications.