Composite surface on a steel substrate
CA 2540344 C · Owner: Benum, Leslie Wilfred · Inventors: Petrone, Sabino Steven Anthony; Benum, Leslie Wilfred; Oballa, Michael C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite surface having a thickness from 10 to 5,000 microns comprising a spinel of the formula MnxCr3_xO4 wherein x is from 0.5 to 2 and oxides of Mn Si selected from the group consisting of MnO MnSiO3, Mn2SiO4 and mixtures , thereof which are not prone to coking and are suitable for hydrocarbyl reactions such as furnace tubes for cracking.
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 9, 2004 and granted August 27, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2026.
- 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.