US 11,938,215 B2
Method for operating a benefit agent delivery system comprising microcells having an electrically eroding sealing layer
Lei Liu, Fremont, CA (US)
Assigned to E INK CORPORATION, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Jan. 25, 2023, as Appl. No. 18/159,611.
Application 18/159,611 is a division of application No. 16/952,433, filed on Nov. 19, 2020.
Claims priority of provisional application 62/941,216, filed on Nov. 27, 2019.
Prior Publication US 2023/0165787 A1, Jun. 1, 2023
Int. Cl. A61K 9/00 (2006.01); A61K 9/70 (2006.01); A61M 37/00 (2006.01)
CPC A61K 9/0009 (2013.01) [A61K 9/703 (2013.01); A61M 37/00 (2013.01); A61M 2037/0007 (2013.01); A61M 2205/0216 (2013.01); A61M 2205/0233 (2013.01); A61M 2205/0238 (2013.01); A61M 2207/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for operating a benefit agent delivery system comprising the steps of:
providing a benefit agent delivery system comprising (a) a conductive layer, (b) a plurality of microcells, each microcell including an opening and containing a carrier and a benefit agent, (c) a sealing layer spanning the opening of each microcell and comprising a polymeric material and a metallic material, (d) an electrode layer; and (e) a voltage source; wherein the conductive layer, the microcell layer, the sealing layer and the electrode layer are vertically stacked upon each other; wherein the microcell layer and the sealing layer are disposed between the conductive layer and the electrode layer; and wherein the voltage source is coupled to the conductive layer and the electrode layer;
applying a voltage potential difference between the conductive layer and the electrode layer to generate an electric field having a polarity causing oxidation of the metallic material, removal of the metallic material from the sealing layer, and migration of the metallic material onto a surface of the microcell adjacent to the conductive layer.