US 12,338,352 B2
Dry erase inks, and associated methods and writing instruments
Russell Andrew Vanderhoof, Joliet, IL (US); and Wing Sum Vincent Kwan, Alpharetta, GA (US)
Assigned to Sanford L.P., Atlanta, GA (US)
Appl. No. 17/413,159
Filed by Sanford L.P., Atlanta, GA (US)
PCT Filed Dec. 13, 2019, PCT No. PCT/US2019/066179
§ 371(c)(1), (2) Date Jun. 11, 2021,
PCT Pub. No. WO2020/123914, PCT Pub. Date Jun. 18, 2020.
Claims priority of provisional application 62/779,541, filed on Dec. 14, 2018.
Prior Publication US 2022/0064464 A1, Mar. 3, 2022
Int. Cl. C09D 11/17 (2014.01); B43K 1/01 (2006.01); B43K 8/03 (2006.01)
CPC C09D 11/17 (2013.01) [B43K 1/01 (2013.01); B43K 8/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An ink formulation comprising a colorant encapsulated in a plurality of capsules, wherein the plurality of capsules comprises a release agent, where the release agent comprises epoxy acrylate, polyester acrylate, polyether acrylate, 2-(2-ethoxyethoxy) ethylacrylate, 2-phenoxy ethyl acrylate, tetrahydrofurfuryl methacylate, ortho-phenoxy ethyl acrylate, pentaerythriol acrylate, cyclic trimethylolpropane formal acrylate, isobornyl acrylate, benzyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, or any combination thereof, wherein the ink formulation is a dry erase ink.