Fine grained batio3 powder mixture and method for making
CA 2033582 A1 · Owner: Mra Laboratories, Inc. · Inventors: Maher, Galeb H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
FINE GRAINED BaTiO3 POWDER MIXTURE, AND METHOD FOR MAKING Abstract of the Disclosure, Disc and multilayer ceramic capacitors having a fine grained barium titanate body exhibit a high dielectric constant and a smooth (X7R) temperature coefficient of capacitance. Such capacitors are made by mixing barium titanate powder of less than 0.7 micron average particle size, with around 2 weight percent of a cadmium silicate flux serving as a reactivity and sintering promoter and one weight percent Nb2O5 serving as a reactivity and sintering inhibitor. After preparing a green body of this mixture the body is sintered at about 1100°C. A powder mixture for manufacture of such capacitors includes mixing …
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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 January 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2013.
- 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.