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:
Mar. 31, 2026
Filed:
Jul. 03, 2023
Applicant:
Jsp Corporation, Tokyo, JP;
Inventor:
Hisashi Masumoto, Yokkaichi, JP;
Assignee:
JSP CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 44/44 (2006.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01);
U.S. Cl.
CPC ...
B29C 44/445 (2013.01); B29K 2023/12 (2013.01); B29K 2105/041 (2013.01); B29K 2995/0063 (2013.01); B29K 2995/0097 (2013.01);
Abstract
An expanded bead of polypropylene-based resin formed with a through hole that is defined by an inner peripheral surface and that has an average hole diameter of 1 mm or less. The expanded bead has a closed cell content of 85% or more, an average cell diameter of 50 to 300 μm and an inner surface portion that extends along the inner peripheral surface that has an average cell diameter of 5 to 150 μm which is smaller than the average cell diameter of the expanded bead.