Metal oxide varistor
CA 1194286 A · Owner: Tokyo Shibaura Denki Kabushiki Kaisha · Inventors: Kanai, Hideyuki; Hirao, Osamu; Endo, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal oxide varistor, There is disclosed a metal oxide varistor comprising a component of grain bodies composed of zinc oxide and a component of grain boundary layers composed of another metallic oxide, characterized in that at least a portion of these starting materials is a fine particle powder prepared by a co-precipitation method. The metal oxide varistor of the present invention is excellent in varistor characteristics such as non-linearity to voltage, life performances and capability of energy dissipation, is small in a scatter of the above characteristics between manufacture lots or within each lot at the time of manufacture and has a, good quality stability.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 1, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.