Alloying system and heating control device for high grade galvanized steel sheet
CA 2255138 C · Owner: Shim, Jang-Sub · Inventors: Lee, Jae-Young; Tsurusaki, Kazuya; Asahara, Yuuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alloying system for a galvanized steel sheet using an, induction heating coil, wherein the temperature of the steel sheet in an induction heating furnace is measured based on the impedance of a high frequency heater and the, amount of heating is controlled by feedback to form an, alloy layer of the steel sheet.
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 December 4, 1998 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2020.
- 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.