Hot-rolling steel strip
CA 2284635 A1 · Owner: Thyssen Stahl Ag · Inventors: Wolpert, Waldemar; Kawalla, Rudolf; Pircher, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing strips of non-alloy and lowalloy steel with homogeneous structures and properties by continuous hotrolling, by passing several times in the austenite zone and then in the ferrite zone, as well as by reeling. The invention is characterized in that the steel strip that was continuously cast and/or rough rolled in the austenite zone is rolled by passing twice or more in the austenite zone at a , starting temperature TAr3 +30 ~C with a total strain of eh30 %. After each pass, the rolled product is intensively cooled until completion of the ferrite conversion. The rolled product is then subjected to final rolling by passing several times …
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 March 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 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.
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.