An improved method of welding austenitic steel pipes
CA 2595087 C · Owner: Patrick, Charles · Inventors: Messer, Barry; Seitz, Shawn; Armstrong, Kenneth E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Contemplated methods for welding stainless steel substantially improve welding speed and quality. Most typically, such attributes are achieved by welding a root pass using GMAW-Sm to thereby depositing a root welding a hot pass using , GMAW-P to thereby deposit additional weld metal onto the root and by welding , at least one of a fill pass and a cap pass using at least one of GMAW-P and FCAW.
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 May 17, 2005 and granted September 10, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.