The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2021
Filed:
Aug. 14, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
James P. Endle, New Richmond, WI (US);
Jeffrey L. Hamer, Springville, IN (US);
Alan R. Seville, Indianapolis, IN (US);
Kenneth F. Teeters, Zionsville, IN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29C 44/12 (2006.01); C08J 9/10 (2006.01); C08J 9/32 (2006.01); A61F 11/08 (2006.01); B29C 44/34 (2006.01); B29L 31/00 (2006.01); B29K 25/00 (2006.01); B29L 9/00 (2006.01); B29L 31/48 (2006.01);
U.S. Cl.
CPC ...
B29C 44/12 (2013.01); A61F 11/08 (2013.01); B29C 44/1266 (2013.01); B29C 44/3484 (2013.01); C08J 9/105 (2013.01); C08J 9/32 (2013.01); A61F 2011/085 (2013.01); B29K 2025/04 (2013.01); B29L 2009/00 (2013.01); B29L 2031/4842 (2013.01); B29L 2031/768 (2013.01); C08J 2203/04 (2013.01); C08J 2203/184 (2013.01); C08J 2203/22 (2013.01); C08J 2353/02 (2013.01);
Abstract
A method of making personal protective equipment, such as a push-in earplug, is disclosed. The method includes the steps of covering a substrate with an outer layer that includes an unactivated foaming agent, positioning at least a portion of the outer layer in a mold, and activating the foaming agent such that a portion of the outer layer expands.