Welded ferritic stainless steel articles
CA 1115093 A · Owner: Crucible Inc. · Inventors: Pinnow, Kenneth E.; Bressanelli, Jerome P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stainless steel welded article with excellent corroresistance, formability and notch toughness such as welded, tubing and the like, made from a columbium and/or titanium stabilized substantially fully ferritic stainless steel consisting essentially of, in weight percent, below 0.04 carbon below, 0.04 nitrogen, the sum of the carbon and nitrogen contents being above 0.006 and below 0.07, up to 1.0 manganese up to 1.0, silicon, 23.0 to less than 28.0 chromium 2.00 to 4.75 nickel, 0.75 to 3.50 molybdenum and the balance iron and incidental, impurities. When carbon plus nitrogen is in the range of 0.006 to 0.04, columbium in the amount of 0.05 to 0.70 may be used alone, but the columbium …
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
- Granted December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
- 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.