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:
Oct. 25, 1983
Filed:
May. 14, 1982
Isao Ishii, Amagasaki, JP;
Tadaki Murakami, Amagasaki, JP;
Yoshiaki Sakamoto, Amagasaki, JP;
Yoshikazu Utsumi, Amagasaki, JP;
Tatsuharu Nakamura, Sanda, JP;
Hiroshi Takayanagi, Sanda, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An arc resistant insulator composed of a composite composition comprising an insulating base material and a zinc borate hydrate. The insulating base material is composed of aluminum oxide and/or aluminum hydroxide and mica power. The zinc borate hydrate is composed essentially of 2ZnO.3B.sub.2 O.sub.3.3H.sub.2 O. The arc resistant insulator is prepared by mixing the insulating base material with a zinc borate hydrate forming material composed of normal boric acid, boric acid anhydride and zinc oxide and heating and compacting the mixture thus obtained in a closed system at a temperature of at least 155.degree. C. under pressure of at least 50 kg/cm.sup.2.