IP Library Granted Patent US 12,629,285
Granted Patent B1
US 12,629,285 · App. 18/951,293 · Granted May 19, 2026

Glow in the dark earplugs

Inventor: Ryan Parry (Los Angeles, CA)
Assignee: Strand Industries LLC
A61F11/085C08G77/04C08K3/105
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,629,285
App. No.
18/951,293
Granted
May 19, 2026
Kind
B1
Abstract

An earplug includes a body made of a silicone material containing a phosphorescent material that causes the earplug to glow in the dark after exposure to light. A filter for reducing sound is positioned within the body. The silicone material includes 80-90% polydimethylsiloxane and 5-15% of the phosphorescent material, such as zinc sulfide, strontium aluminate, or rare-earth metal chelates. A fin extends from the body and fits into folds of an outer ear to secure the earplug in place. The body has a layered design with multiple sections that gradually decrease in diameter toward a tip of the earplug.

Claims (22)

1 . An earplug device, comprising:

a body made of a silicone material, wherein the silicone material comprises a phosphorescent material that causes the earplug to glow after being exposed to light; and

a sound-impeding filter positioned within the body,

wherein the body has a layered design with multiple sections that gradually decrease in diameter towards a tip of the earplug device, and

wherein the sound-impeding filter is positioned within a narrow channel at the tip of the earplug device, and wherein the earplug device further comprises 2-5% silica as a reinforcing filler, 1-3% of a curing agent, 0.5-2% of a plasticizer, 0.1-0.5% of a fluorescent dye, and 0.05-0.1% of an antimicrobial agent.

2 . The earplug device of claim 1 , wherein the phosphorescent material is selected from the group consisting of zinc sulfide, strontium aluminate, and rare-earth metal chelates.

3 . The earplug device of claim 2 , wherein the phosphorescent material comprises strontium aluminate doped with europium and dysprosium.

4 . The earplug device of claim 1 , wherein the silicone material comprises 80-90% polydimethylsiloxane and 5-15% of the phosphorescent material.

5 . The earplug device of claim 1 , further comprising a fin extending from the body, the fin configured to fit into folds of an outer ear to secure the earplug device in place.

6 . A method of manufacturing an earplug device, comprising:

mixing a silicone material with a phosphorescent material to form a mixture;

molding the mixture into an earplug body shape; and

curing the molded mixture;

wherein the phosphorescent material is selected from the group consisting of zinc sulfide, strontium aluminate, and rare-earth metal chelates;

wherein mixing the silicone material with the phosphorescent material comprises combining 80-90% polydimethylsiloxane and 5-15% of the phosphorescent material;

further comprising adding 2-5% silica as a reinforcing filler, 1-3% of a curing agent, 0.5-2% of a plasticizer, 0.1-0.5% of a fluorescent dye, and 0.05-0.1% of an antimicrobial agent to the mixture.

7 . The method of claim 6 , wherein molding the mixture into an earplug body shape comprises forming a layered design with multiple sections that gradually decrease in diameter towards a tip of the earplug device.

8 . The method of claim 7 , wherein inserting the sound-impeding filter comprises positioning the filter within a narrow channel at the tip of the earplug device, and wherein the phosphorescent material comprises strontium aluminate doped with europium and dysprosium.

9 . A method of using an earplug device, comprising:

exposing an earplug device to light, wherein the earplug device comprises a body made of a silicone material incorporating a phosphorescent material, wherein exposing the earplug device to light comprises exposing the earplug device to natural sunlight or artificial light for a duration of 5 to 30 minutes, wherein the phosphorescent material is selected from the group consisting of zinc sulfide, strontium aluminate, and rare-earth metal chelates;

inserting the earplug device into an ear canal, wherein inserting the earplug device into the ear canal comprises positioning a fin extending from the body of the earplug device into folds of an outer ear to secure the earplug device in place; and

blocking sound using a sound-impeding filter positioned within the body of the earplug device, wherein blocking sound comprises reducing an amplitude of sound waves entering the ear canal using the sound-impeding filter, wherein the body of the earplug device has a layered design with multiple sections that gradually decrease in diameter towards a tip of the earplug device, wherein the silicone material of the earplug device comprises 80-90% polydimethylsiloxane and 5-15% of the phosphorescent material, wherein the phosphorescent material comprises strontium aluminate doped with europium and dysprosium, wherein the earplug device further comprises 2-5% silica as a reinforcing filler, 1-3% of a curing agent, 0.5-2% of a plasticizer, 0.1-0.5% of a fluorescent dye, and 0.05-0.1% of an antimicrobial agent, and wherein the sound-impeding filter is positioned within a narrow channel at the tip of the earplug device.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 18, 2024
From: PARRY, RYAN
To: STRAND INDUSTRIES LLC
Reel/Frame 069309/0576 →
References Cited (6)
US 8509453B2 · Bychkov · 2013 [cited by applicant]
US 9803582B2 · Clacken · 2017 [cited by applicant]
CN 102690510A · 2012 [cited by examiner]
CN 108670554A · 2018 [cited by examiner]
DE 102017217718A1 · 2019 [cited by examiner]
JP 2000350298A · 2000 [cited by examiner]