Powder metallurgy tool steel article
CA 1191039 A · Owner: Crucible Materials Corporation · Inventors: Stasko, William; Haswell, Walter T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder metallurgy article which is particularly, adapted to the manufacture of hot working rolls and tooling as well as high toughness cold work tooling such as shear blades and slitter knives, formed from compacted prealloyed powder of an alloy consisting essentially of, in weight percent manganese 0.2 to 1.5, silicon 2 max. chromium 1.5 to 6 molybdenum 0.50 to 6, sulfur, 0.30 max. vanadium 7 to 10 carbon expressed by the formula, (.25 minimum .40 maximum + .16 x percent vanadium), optional carbide forming elements such as tungsten and columbium m amounts up to 5 percent (with the corresponding stoichiometric carbon required for balance) may partially replace vanadium optional, cobalt …
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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
- Granted July 30, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2002.
- 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.