US 12,268,575 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 Jul. 24, 2024, as Appl. No. 18/782,808.
Application 18/782,808 is a division of application No. 17/480,116, filed on Sep. 20, 2021.
Application 17/480,116 is a continuation of application No. 16/164,013, filed on Oct. 18, 2018, abandoned.
Prior Publication US 2024/0374431 A1, Nov. 14, 2024
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)] 10 Claims
OG exemplary drawing
 
1. A method of making a foam earplug having an outer layer infused with a transdermal material having a beneficial effect, the method comprising:
providing a foamable plastic material,
providing a mold having a cavity sized and shaped to form an elongated flat sheet of foamed plastic material,
placing the foamable plastic material within the cavity to foam to the size and shape of the cavity to form the elongated flat sheet of foamed plastic material,
providing a punch having an interior size of an earplug to fit at least partially within an ear canal,
repeatedly punching the elongated flat sheet of foamed plastic material to form multiple earplugs each having a size and shape to fit at least partially within an ear canal,
providing a transdermal material having a particular beneficial effect, the transdermal material comprising a sleep aid material, and
coating the earplug with the transdermal material to form a resilient foam plastic earplug having an outer layer infused with the transdermal material.