Ferroelectric ceramic material
CA 2178761 C · Owner: Schlenkrich, Falko · Inventors: Schonecker, Andreas; Schlenkrich, Falko; Gesemann, Hans-Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ferroelectric ceramic material consists of a ceramic perovskitic mixed crystal which comprises a mixture of at least one component selected from the group consisting of PbTiO3, BaTiO3, Pb(Fe1/2Nb1/2)O3 and Pb(Zn1/3Nb2/3)O3, with at least one component selected from the group consisting of, Pb(Mg1/3Nb2/3)O3 Pb(Ni1/3Nb2/3)O3, Pb(Fe2/3W1/3)O3, and Pb(Mn1/2Nb1/2)O3. The proportions of the components are determined according to the following equation:, ? Xi x Tci = TcM, i = 1, where Xi is the mole fraction of each i-component Tci, is the Curie point of the i-component and TcM is the Curie point of the mixture of components between 50°C and 100°C. The ferroelectric ceramic material according to …
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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
- Filed June 10, 1996 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.