Corrosion resistant, martensitic steel alloy
CA 2175341 C · Owner: Novotny, Paul M. · Inventors: Novotny, Paul M.; Hemphill, Raymond M.; Mccaffrey, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
p martensitic steel alloy has a unique combination of hardness and corrosion resistance. Broadly stated the alloy, contains, in weight percent about: C 1.40-1.75 Mn 0.30-1.0, Si 0.80 max. P 0.020 max, S 0.015 max. Cr 13.5-18.0 Ni, 0.15-0.65, Mo 0.40-1.50, V 1.0 max. N 0.02-0.08 and the balance essentially iron. The alloy is balanced within the stated weight percent ranges such that the ratio %Cr.%C is about 10.0-11.0 and the sum %Ni+%Mn is at least about 0.75. The alloy can be hardened to at least about 60 HRC from a wide range of solution treating temperatures and provides corrosion resistance that is similar to Type 440c alloy.
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 October 24, 1994 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2016.
- 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.