Iron-based mixed powder for powder metallurgy and iron-based sintered compact
CA 2501417 A1 · Owner: Jfe Steel Corporation · Inventors: Uenosono, Satoshi; Sonobe, Akio; Ohta, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to improve machinability of a sintered compact a phosphate compound , of an, alkali earth metal (calcium phosphate compound or the like) is mixed with an iron-based, powder, or an alkali earth metal fluoride (calcium fluoride or the like) is , further mixed with, the iron-based powder. Alternatively the alkali earth metal fluoride, together with a graphite powder, is preferably fixed to recesses of the iron-based powder.
Read the whole patent
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 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2024.
- 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.