Process and apparatus for applying and removing liquid coolant to control temperature of continuously moving metal strip
CA 2117481 C · Owner: Alcan International Limited · Inventors: Sivilotti, Olivo; Thorburn, Herbert J.; Leone, Gino L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cooling of metal strip (16) in a single or multistand cold rolling line by applying coolant liquid only to the lower surface of the strip (16), and removing the liquid therefrom after each, or between successive roll stands (11a 11b, 11c). The liquid is delivered, at each cooling locality at low pressure through a plurality of slots (32) each extending transversely beneath and across the full width of the strip (16), the slots (32) being spaced apart along the path of the strip (16) and generally being oriented to discharge the coolant liquid toward the strip lower surface at an angle of greater than 90° to the direction of strip advance. Coolant removal is effected by directing one or more …
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 February 12, 1993 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2015.
- 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.