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:
Jan. 11, 2022
Filed:
Nov. 12, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventor:
Jin-Ho Lee, Seoul, KR;
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A62B 18/08 (2006.01); A62B 18/02 (2006.01); A62B 7/10 (2006.01); A62B 23/02 (2006.01); A62B 18/10 (2006.01);
U.S. Cl.
CPC ...
A62B 18/08 (2013.01); A62B 7/10 (2013.01); A62B 18/025 (2013.01); A62B 18/10 (2013.01); A62B 23/025 (2013.01);
Abstract
An inner shell according to an embodiment of the present disclosure, which is provided to maintain a shape of a mask, includes a circumferential part forming an edge, a curved part formed in an arch shape at an inner side of the circumferential part, and a plurality of ribs formed to radially protrude from a peak area of the curved part toward the circumferential part, wherein the circumferential part, the curved part, and the ribs are integrally formed as a sheet member formed of a porous material.