Preparation of metal-matrix composite materials using ceramic particles with modified surfaces
CA 2339803 A1 · Owner: Alcan International Limited · Inventors: Doutre, Don Allen; Hay, Gary; Wales, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite material is prepared by furnishing a mass of ceramic particles such as aluminum oxide or spinel particles and contacting a source of , magnesium or other passivating metal with the mass of ceramic particles. Magnesium is deposited onto the surfaces of the particles in the absence of added oxygen and nitrogen. A source of aluminum or other matrix metal is infiltrated into the mass of ceramic particles to form an aluminum (or other metal)-containing composite material. This composite material may be further dispersed into a second source of aluminum or other matrix metal to form a composite material of a lower volume fraction of particles.
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 August 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 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.