US 11,655,383 B2
Photochromic compositions, markers containing the same, and systems and methods for their use
Andrew Seth Levine, Lutherville, MD (US); Nicole Ann Zujovic, Baltimore, MD (US); and Debora Hense, Plymouth, MI (US)
Assigned to JADS INTERNATIONAL LLC, Lutherville, MD (US)
Filed by JADS INTERNATIONAL LLC, Lutherville, MD (US)
Filed on Feb. 19, 2019, as Appl. No. 16/279,125.
Application 16/279,125 is a continuation in part of application No. PCT/US2017/047751, filed on Aug. 21, 2017.
Claims priority of provisional application 62/377,033, filed on Aug. 19, 2016.
Prior Publication US 2019/0284406 A1, Sep. 19, 2019
Int. Cl. C09D 11/00 (2014.01); C09D 11/17 (2014.01); C09D 11/50 (2014.01); A61K 8/72 (2006.01); A61K 8/87 (2006.01); A61Q 1/02 (2006.01); A61K 8/81 (2006.01); C09D 1/00 (2006.01); C09D 4/00 (2006.01); C09D 5/00 (2006.01); G01N 21/29 (2006.01)
CPC C09D 11/17 (2013.01) [A61K 8/72 (2013.01); A61K 8/8152 (2013.01); A61K 8/87 (2013.01); A61Q 1/025 (2013.01); C09D 11/50 (2013.01); A61K 2800/438 (2013.01); G01N 21/29 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An ink composition comprising at least one photochromic pigment or dye, at least one film-forming resin, and at least one solvent in which the at least one photochromic pigment or dye and the at least one film-forming resin are blendable, dispersible or dissolvable, wherein the components of the ink composition are present in respective amounts such that the ink composition is in the form of a liquid or gel until evaporation of the at least one solvent, wherein, upon evaporation of the at least one solvent, the at least one film-forming resin forms a film that (a) substantially prevents the ink composition from degrading when covered with the sunscreen product and (b) inhibits the ink composition from washing off when the sunscreen is washed off, wherein the at least one photochromic pigment or dye is an irreversible photochromic pigment or dye that fades from an initial color to a faded color within a predetermined time frame when exposed to a UV/VIS light source, the at least one photochromic pigment or dye being selected such that most or all of the wavelengths of UV/VIS light absorption of the ink composition falls outside the range of protection of a selected sunscreen product so as to render the selected sunscreen product ineffective as a screener for the at least one photochromic pigment or dye when the sunscreen product is applied over the ink composition whereby the photochromic pigment or dye will fade to the faded color in the predetermined time frame regardless of whether the select sunscreen product is applied over the ink composition with the ink composition exposed to the light source.