Graded refractory cermet article
CA 1284022 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Sowman, Harold G.; Kaar, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shaped, graded cermet article comprising at, least one continuous ceramic phase and at least one discontinuous metal phase, the ratio of ceramic/metal being controlled and varied over the thickness of the article. The ceramic phase preferably is microcrystalline which is the result of firing at temperatures above approximately 800°C. Refractories of this invention, in the form of fibers, powders, films, flakes, microspheres bubbles, particles, granules and the like are used, for example, as, reinforcements in structures and composites in filtering, or adsorption applications as catalysts, and as abrasive, materials.
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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
- Granted May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
- 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.