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:
Dec. 15, 2020
Filed:
Oct. 25, 2018
Mazda Motor Corporation, Hiroshima, JP;
Tomoya Yoshida, Hiroshima, JP;
Shuhei Narita, Hiroshima, JP;
Keisuke Yamakawa, Hiroshima, JP;
Takashi Sasaki, Hiroshima, JP;
Ryuji Nonaka, Hiroshima, JP;
Masanori Ishikawa, Hiroshima, JP;
Katsumi Shiraishi, Hiroshima, JP;
Seiji Nakano, Higashihiroshima, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Abstract
In order to increase road noise transmission loss, a double-wall panel includes a core material. The core material is enclosed between an outer wall and an inner wall facing each other, and has at least a predetermined thickness across the panel in all in-plane directions of the walls. The core material has a specific surface area of 20,000 (mm/cm) or more, where the specific surface area is defined as a surface area per unit volume.