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:
Nov. 24, 2015
Filed:
Jul. 21, 2011
Applicant:
Jean-francois Letard, Canejean, FR;
Inventor:
Jean-Francois Letard, Canejean, FR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 11/00 (2014.01); B41M 5/28 (2006.01); C09D 11/50 (2014.01);
U.S. Cl.
CPC ...
B41M 5/282 (2013.01); C09D 11/50 (2013.01); B41M 5/283 (2013.01); B41M 5/284 (2013.01);
Abstract
The invention relates to a treatment for printing a surface with an ink that includes a compound that exhibits a change of electronic spin state as a function of temperature, imparting optical properties such that the ink is visible in a temperature range that includes an ambient temperature of around 20° C. and is transparent in the visible spectrum when the ink is brought to a temperature above said range and then brought back down to a temperature within the range.