US 12,336,884 B2
Foam earplug with transdermal material
Mark Magidson, Los Angeles, CA (US); James Hornstein, Studio City, CA (US); and Fred Ryan, Venice, CA (US)
Assigned to Moldex-Metric, Inc., Culver City, CA (US)
Filed by MOLDEX-METRIC, INC., Culver City, CA (US)
Filed on Sep. 20, 2021, as Appl. No. 17/480,116.
Application 17/480,116 is a continuation of application No. 16/164,013, filed on Oct. 18, 2018, abandoned.
Prior Publication US 2022/0087868 A1, Mar. 24, 2022
Int. Cl. A61F 11/08 (2006.01); A61F 11/12 (2006.01); A61L 31/16 (2006.01); A61M 31/00 (2006.01); A61M 35/00 (2006.01)
CPC A61F 11/08 (2013.01) [A61M 31/002 (2013.01); A61F 11/085 (2022.01); A61F 11/12 (2013.01); A61L 31/16 (2013.01); A61M 35/00 (2013.01); A61M 2210/0662 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of making a foam earplug having an outer layer infused with a transdermal material having a particular beneficial effect, including the following steps:
providing a mold having at least one cavity of a size and shape corresponding to an earplug that fits at least partially within an ear canal;
providing a foamable plastic material;
injecting, via at least one nozzle, the foamable plastic material into the cavity;
allowing the foamable plastic material to foam within the cavity to the size and shape of the cavity to form a resilient foam plastic earplug;
removing the earplug from the cavity;
providing the transdermal material having the particular beneficial effect; and
coating the earplug with the transdermal material to form a resilient foam plastic earplug having an outer layer infused with the transdermal material,
wherein the transdermal material comprises a sleep aid material.