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. 21, 1989
Filed:
Jun. 22, 1987
Hidekazu Tsurumaru, Osaka, JP;
Nobuhiro Fujio, Akashi, JP;
Takeshi Yamasaki, Higashiosaka, JP;
Toshio Nishizaki, Urawa, JP;
Isao Negisi, Kawaguchi, JP;
Tatsuta Electric Wire and Cable Co., Ltd., Higashiosaka, JP;
Nippon Mining Co., Ltd., Tokyo, JP;
Abstract
Fillers comprising a composition in which 50-90 wt. % or iron oxides and 10-30 wt. % of silica are contained, at least 50 wt. % of the iron oxides being present in the form of iron oxide silicate, and the content of alkali metal oxides or alkaline earth metal oxides is 10 wt. % or less in total, are suitable as fillers for the fabrication of noise insulating materials. Noise insulating materials obtained by using said fillers are excellent in flexibility and processibility and moreover are large in surface density, thus exhibiting excellent noise insulating ability.