Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Richard E. Knauer0
Alan R. Seville0
Date of Patent
January 13, 2009
0Patent Application Number
109659390
Date Filed
October 15, 2004
0Patent Primary Examiner
Patent abstract
An earplug comprising a foam composition containing a polyvinyl chloride resin and less than about 5 wt % monomeric phthalate, based on the total weight of the foam composition, is described. The foam composition may include a plasticizer containing less than or equal to about 2 wt % monomeric phthalate, based on the total weight of the plasticizer. The earplugs have slow recovery times from 60 percent compression to 10 percent compression of about 10 to about 60 seconds.
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