Low-aluminum steel sheet for packaging
CA 2314533 C · Owner: Sollac · Inventors: Bouzekri, Mohamed
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a steel strip with low aluminum content which includes between 0.050 and 0.080% by weight of carbon between 0.25 and 0.40% by weight of manganese less than 0.020% by weight of aluminum and between 0.010 and 0.014% by weight of nitrogen the remainder being iron and inevitable trace impurities. The steel consists of free carbon a number of grains per mm2 greater than 30,000 and when in an aged condition said sheet includes a percentage elongation A % satisfying the relationship: (750-Rm)/16.5SA %S(850-Rm)/17.5 Rm where Rm is the maximum rupture strength of the steel. Figure: none.
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 June 30, 2000 and granted April 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2022.
- 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.