Method of heat-treating thin sheet coated with znal by hot dip galvanization
CA 2270897 A1 · Owner: Thyssen Stahl Ag · Inventors: Durr, Wilhelm; Warnecke, Wilhelm; Heiler, Hans-Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method of heat-treating thin sheet which has been coated with zinc and/or aluminium by hot dip galvanization. The invention is characterized in that, immediately after the coating applied to its surfaces in the hot dip bath has hardened, the thin sheet is heated for between 2 and 10 seconds to a temperature which is between 20 and 100~C above the liquidus temperature of the coating material and is then cooled to ambient temperature.
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 September 3, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2019.
- 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.