Enhanced weldability steel
CA 2053197 C · Owner: Sollac · Inventors: Taillard, Roland; Maurickx, Thierry; Verrier, Pascal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
his invention relates to a steel with improved weldability good resistance to fissuring for high welding energies and good cold resilience needing no preheating before welding. The composition of the steel by weight is: 0.07 to 0.11% carbon 1.40 to 1.70% manganese, 0.20 to 0.55% nickel 0 to 0.30% copper, 0 to 0.02% niobium, 0.005 to 0.020% titanium 0.002 to 0.006% nitrogen, 0 to 0.15% silicium the rest being iron.
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 October 10, 1991 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2013.
- 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.