Method for preparing green sheets
CA 2051272 A1 · Owner: Wakamura, Masato · Inventors: Yokouchi, Kishio; Kamezaki, Hiroshi; Wakamura, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods for preparing a green sheet and a glass ceramic substrate are herein disclosed. The object of these methods is to make green sheets and glass ceramic substrates practically acceptable the, green sheets and the glass ceramic substrates having a low dielectric constant and low scattering in properties, and the method comprises the steps of preparing a mixture of hollow silica microspheres borosilicate glass powder and ceramic powder as a principal ingredient, adding a plasticizer a binder and, a solvent to the mixture kneading the mixture and, forming it into a green sheet wherein the shell-, thickness of the hollow silica microspheres is controlled so that the specific gravity of the …
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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 September 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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.