Advanced ultra-supercritical boiler tubing alloy
CA 2336209 A1 · Owner: Farr, Norman Charles · Inventors: Smith, Gaylord Darrell; Farr, Norman Charles; Patel, Shailesh Jayantilal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ultra supercritical boiler tubing alloy characterized by a microstructure stabilized and strengthened for 375 bar/700 ~C steam in weight percent, service and alloyed to resist coal ash/flue gas corrosion for 200,000 hours consisting of 10 to 24 cobalt, 22.6 to 30 chromium 2.4 to 6 molybdenum, 0 to , 9 iron, 0.2 to 3.2 aluminum 0.2 to 2.8 titanium, 0.1 to 2.5 niobium 0 to 2 , manganese, 0 to 1 silicon, 0.01 to 0.3 zirconium 0.001 to 0.01 boron, 0.005 , to 0.3 carbon 0 to 4 tungsten, 0 to 1 tantalum and balance nickel and incidental impurities.
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 June 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2021.
- 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.