Method of preparing pressable powders of a transition metal carbide, iron group metal or mixtures thereof
CA 2314941 A1 · Owner: The Dow Chemical Company · Inventors: Carroll, Daniel F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressable powder is formed by a method comprising I mixing in essentially , deoxygenated water, A a first powder selected from the group consisting of a transition metal carbide and transition metal with B an additional component selected from the group consisting of (i) a second powder comprised of a transition metal carbide, transition metal or mixture thereof (ii) an organic , binder and (iii) combination thereof and II drying the mixed mixture to form the pressable powder, wherein the second powder is chemically different than the first powder. The pressable powder may then be formed into a shaped part and subsequently densified into a densified part such as a cemented tungsten …
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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 March 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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
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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.