High voltage porcelain insulators
CA 1283180 C · Owner: Mima, Toshiyuki · Inventors: Seike, Shoji; Mima, Toshiyuki; Totoki, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A high voltage porcelain insulator is disclosed which has a glaze applied to at least a head portion of the insulator which head portion is covered by a metal fitting and a cement. The glaze essentially consists of, in terms of weight, from 64.0 to 68.0% of SiO2 from 17.5 to 19.0% of Al2O3, from 5.0 to 6.5% of MgO and more than 3.0% of CaO, from 2.0 to 2.8% of K2O and Na2O in a total amount, and from 3.0 to 9.0% when, calculated as MnO, a compound which is converted to MnO and or MnO2 after being fired at a temperature range suitable for firing porcelain.
Read the whole patent
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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
- 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.