Method for making sucker rods
CA 1285404 C · Owner: Sutovsky, Pavel M. · Inventors: Shikhlinsky, Talat M.O.; Timofeev, Vladimir I.; Ibragimov, Oktai I.O. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method for making sucker rods comprises pressure- -welding of the central rod-body blank with the rod-end blanks made from different materials, and upsetting of the end heads from the welded sucker-rod blank. The length of the rod-end blanks is so selected that the weld joints be established, after the upsetting procedure, across the maximum cross-section of the sucker-rod heads.
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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
- 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.