Electric ceramic composition
CA 2003709 C · Owner: Mukai, Tetsuya · Inventors: Matsumoto, Kazutoshi; Hyuga, Takehiro; Mukai, Tetsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dielectric ceramic composition possessing a high dielectric constant and a high unloaded Q and exhibiting stable electric properties even in the high frequency range of 10 GHz contains not less than 59.0 mol% and not more than 66.0 mol% of BaO less, than 10 mol% of ZnO, less than 10 mol% of MgO less than 10 mol%, of NiO, less than 10 mol% of ZrO2 and not less than 19.0 mol%, and less than 24 mol% of Ta205.
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
- Filed November 23, 1989 and granted March 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2011.
- 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.