Hydrogen absorbing alloy powder and method of producing hydrogen absorbing alloy powder
CA 2266474 C · Owner: Iba, Hideki · Inventors: Iba, Hideki; Mori, Toshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A method of treating surfaces of a hydrogen absorbing alloy and particularly, a method of treating surfaces of a hydrogen absorbing alloy by enhancing the resistance of the surfaces of the powder against contamination such as oxide film, moisture and adsorptive gases when the alloy powder is being treated in the open air. In pulverizing or in treating a powdery hydrogen absorbing alloy or in producing a powder by the quickly quenched coagulation the hydrogen , absorbing alloy is treated in an atmosphere containing an SF6 gas to form a protection film containing at least a sulfide or a fluoride on the surfaces of the hydrogen absorbing alloy in order to enhance resistance against …
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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 September 26, 1997 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2019.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.