Method for the production of ductile cast iron
CA 2093419 A1 · Owner: Backerud, Stig Lennert · Inventors: Backerud, Stig Lennert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method in the production of ductile cast iron comprising controlling and correcting the composition of the cast iron melt. The method further comprises extracting a sample from the melt the, mother melt, and adding an amount of an oxide a sulphide or an, oxy-sulphide with the ability to oxidize an amount of the modifying agent present in the sample and corresponding to the fading rate occurent during the casting process as a whole. The sample is permitted to solidify in a sample vessel equipped with two thermocouples, one in the centre of the sample vessel and the other in the vicinity of the sample vessel wall. The temperature and time are recorded during the process of solidification …
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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 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 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.