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, 2000
Filed:
Feb. 12, 1998
Applicant:
Inventors:
Nobuyuki Takahashi, Osaka, JP;
Manabu Matsunaga, Osaka, JP;
Kazumasa Tanaka, Osaka, JP;
Yasunori Sugihara, Osaka, JP;
Assignee:
Nitto Denko Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; H02K / ;
U.S. Cl.
CPC ...
4283044 ; 181201 ; 181202 ; 360133 ; 360900 ;
Abstract
A soundproof material comprising a porous member having an air permeation amount based on the pressure difference of 2.039.times.1/10.sup.4 mmH.sub.2 O of from 1.times.1/10.sup.10 to 2.times.1/10.sup.2 cc/cm.sup.2 /second, and having a compressibility.