US 11,851,579 B2
Paint and other materials including a taggant
Henry Guy Stevens, Cheltenham (GB)
Assigned to Henry Guy Stevens, Cheltenham (GB)
Appl. No. 17/296,100
Filed by Henry Guy Stevens, Cheltenham (GB)
PCT Filed Dec. 30, 2019, PCT No. PCT/GB2019/053705
§ 371(c)(1), (2) Date May 21, 2021,
PCT Pub. No. WO2020/136381, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 1821277 (GB), filed on Dec. 28, 2018.
Prior Publication US 2022/0010145 A1, Jan. 13, 2022
Int. Cl. C09D 5/22 (2006.01); C09D 7/61 (2018.01); C09D 5/14 (2006.01); C09D 5/18 (2006.01); G01B 11/06 (2006.01); G01N 21/64 (2006.01); G01N 21/84 (2006.01); G01N 33/32 (2006.01); C09K 11/77 (2006.01)
CPC C09D 5/22 (2013.01) [C09D 5/14 (2013.01); C09D 5/18 (2013.01); C09D 7/61 (2018.01); C09K 11/7774 (2013.01); G01B 11/0616 (2013.01); G01N 21/6428 (2013.01); G01N 21/8422 (2013.01); G01N 33/32 (2013.01); G01N 2021/6439 (2013.01); G01N 2021/8427 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A paint or varnish comprising:
in respect of paint, a pigment;
a carrier liquid;
a binder;
one or more additives; and
one or more inorganic or ceramic taggants selected to correspond to the one or more additives,
wherein the one or more taggants are provided in an amount up to 0.1% by weight of the paint or varnish, the one or more taggants are evenly dispersed and suspended in the carrier liquid, and the one or more taggants have a particle size or particle size range suitable for remaining in suspension, and
wherein for authentication of the paint or varnish on a substrate the one or more taggants are excitable by infra-red or ultraviolet light at one wavelength to emit light at one or more other wavelengths, the emission wavelength or spectrum of the one or more taggants being indicative of the one or more additive in the paint or varnish for use in authenticating the paint or varnish.