Corrosion- and wear-resistant cobalt-base alloy
CA 2014694 C · Owner: Haynes International, Inc. · Inventors: Matthews, Steven J.; Crook, Paul; Asphahani, Aziz I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a cobalt-base alloy that has a valuable combination of both corrosion- and wear-resistant properties. The alloy nominally contains in, percent by weight, 25.5 chromium, 8.5 nickel 3.0 iron, 5 molybdenum, 2, tungsten, 0.40 silicon 0.75 manganese, 0.06 carbon, 0.08 nitrogen and the balance cobalt plus normal impurities normally found in alloys of this class. The alloy may also contain copper and certain "carbide formers" (i.e. columbium tantalum, titanium, vanadium and the like) to tie up excess carbon and/or nitrogen that may be present.
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 April 17, 1990 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2012.
- 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.