Ferromagnetic materials
CA 2074161 C · Owner: Harris, Ivor Rex · Inventors: Harris, Ivor Rex; Smith, Nigel Andrew; Ritchie, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a ferromagnetic material Fe60M x N y where M is at least one element selected from Al, Ga In, and T1, N is at least one element selected from P As, Sb and Bi, x has a , range of 1 ~ x ~ 39 and x + y = 40 and excluding Fe60Ga x AS y. A preferred ferromagnetic material is Fe60Ga x As y preferably , when x has a range of 3 ~ x ~ 37 more prefer-, ably when x has a range of 20 ~ x ~ 37 and even more preferably when x has a range of 30 < x ~ 37. Typically, ferromagnetic materials of this type can be homogenised by annealing or melt spinning. Melt spun Fe60Ga x As y can show Curie Temperatures (T c) of about 470 °C and saturation magnetisations of about 89 emu/g. …
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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 5, 1991 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2013.
- 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.