Mechanically alloyed nickel-cobalt-chromium-iron composition of matter
CA 2009363 C · Owner: Smith, Gaylord Darrell · Inventors: Gaul, David John; Weber, John Herbert; Fisher, Roneldo Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanically alloyed composition of matter or alloy containing 30-40% chromium, 5-25% cobalt 0.5-10% iron, 0.2-0.6%, aluminum, 0.3-1.2% titanium up to 0.15% carbon, about 0.2-1% yttria up to about 0.3% nitrogen, the % titanium being at least about 1.4 times the % nitrogen, minor amounts of optional elements the balance, being essentially nickel. The consolidated and hot worked alloy with coarse grains produced by heat treatment at about 1300°C is useful in service requiring hot strength along with extraordinary resistance to oxidation, sulfidation and hot corrosive media. Specific utilization of the alloy of the invention is contemplated in handling molten glass and in utensils adapted to …
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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 February 6, 1990 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2012.
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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.