Porous ceramic sintered body and method for manufacturing the same
CA 2280897 A1 · Owner: Shimada, Kouichi · Inventors: Shimada, Kouichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a porous ceramic sintered body with a specific gravity of 0.3 g/cm3 or less that is formed by filling the ceramic starting material with granules to be transformed into voids during sintering wherein at least two, kinds of the granules with different mean grain sizes with each other, especially larger size granules with a mean grain size in the range from 2.0 to 3.5 mm, medium size granules with a mean grain size in the range from 0.8 to 2.5 mm and smaller size granules with a mean grain size in the range from 0.06 to 0.15 mm, are preferably used together, thereby enabling the porous body to be lightweight while maintaining its mechanical strength.
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 February 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2021.
- 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.