Method of producing high-melting-point and high-toughness metal and apparatus for the same
CA 2062104 C · Owner: Choshi, Tadayuki · Inventors: Naritomi, Tatsuo; Choshi, Tadayuki; Ohta, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an apparatus for producing a high-melting-point and high-toughness metal including a reducing vessel for reducing chlorides of the high-melting-point and high-toughness metal to be produced with an activated metal to form a high-melting-point and high-toughness sponge metal. A condensing vessel is provided for recovering a nonreacted activated metal and the chlorides remaining in the sponge metal formed in the reducing vessel by a vacuum separation. The condensing vessel is arranged sideways relatively to the reducing vessel, the condensing vessel being integrally connected with the reducing vessel through a conduit and at least, one of the reducing vessel and/or the condensing …
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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 February 28, 1992 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2014.
- 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.