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:
Aug. 03, 2021
Filed:
Aug. 30, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
James D. Brown, Bloomington, IN (US);
Feng Cai, Carmel, IN (US);
Robert C. Coffin, Plainfield, IN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 55/00 (2006.01); B29K 23/00 (2006.01); B29L 31/00 (2006.01); A61F 11/12 (2006.01);
U.S. Cl.
CPC ...
A61F 11/12 (2013.01); B29C 55/00 (2013.01); B29C 55/005 (2013.01); B29K 2023/083 (2013.01); B29K 2995/0077 (2013.01); B29L 2031/768 (2013.01);
Abstract
An earplug assembly and method of forming the same is described. The method includes uniaxially stretching a cord formed of copolymer including ethylene segments and vinyl acetate segments to form a cold-drawn cord. The cold drawn cord has an elongation to break of 250% or less. The method then includes fixing the cold drawn cord to an earplug.