Multilayer glass ceramic substrate and method of fabricating the same
CA 2121301 C · Owner: Kimura, Mitsuru · Inventors: Ikuina, Kazuhiro; Kimura, Mitsuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer glass ceramic substrate includes a glass ceramic layer and a plurality of conductive layers laminated via the glass ceramic layer. The glass ceramic layer is composed of inorganic compound consisting of aluminum oxide borosilicate glass, anorthite crystal and celsian crystal wherein the aluminum oxide is contained in the range of 12 to 59.6 weight percent, the borosilicate glass is contained in the range of 18 to 69.6 weight percent the anorthite crystal, is contained in the range of 1 to 40 weight percent and the celsian crystal is contained in the range of 1 to 5 weight percent so that the total is 100 weight percent.
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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 April 14, 1994 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2016.
- 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.