Bar product, cylinder rods, hydraulic cylinders, and method for manufacturing
CA 2400286 A1 · Owner: Peppler, William J. · Inventors: Peppler, William J.; Harpole, Dennis; Wong, Ken K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bar product prepared from microalloyed bar steel is provided. The bar product is prepared by hot rolling and heat treating a microalloyed bar steel. The hot rolled and heat treated microalloyed bar steel is prepared by steps of hot rolling a preform of the microalloyed bar steel at a temperature of between about 1,400~ F and about 2,200~ F to provide a steel bar having a diameter of between about 3/4 inch and about four inches cooling the steel , bar to provide a surface temperature of below about 1,100~ F and heat , treating the steel bar in an environment having a temperature of between about 500~ F and about 1,300~ F. The bar product is preferably prepared without a step of cold …
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 January 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2023.
- 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.