Method for preparing hydrogen storage alloy
CA 2394375 A1 · Owner: Kuriiwa, Takahiro · Inventors: Okada, Masuo; Chou, Tsutomu; Kuriiwa, Takahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing a hydrogen storage alloy having body-centered cubic structure phase being capable of absorbing and releasing hydrogen characterized in that it comprises a melting step of melting raw materials for the alloy having a predetermined element ratio to form a homogeneous melt of an alloy, a heat treatment step of holding the homogeneous alloy melt at a temperature (T) a little lower than the melting point (Tm) of the alloy for a predetermined period of time, and a quenching step of rapidly cooling the heattreated alloy.
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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 December 15, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2022.
- 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.