Submergent entry nozzle
CA 2188764 C · Owner: Vesuvius Crucible Company · Inventors: Heaslip, Lawrence John; Dorricott, James Derek
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A submerged entry nozzle for flowing liquid metal therethrough includes a vertically disposed entrance pipe section having a generally axial symmetry and a first cross-sectional flow area. A transition area having the first cross-sectional flow area with two or more front walls and two or more side walls reduces the thickness of the first cross-sectional area by providing a convergent angle of the front walls and increases the width of the first crosssectional area by providing a divergent angle of the side walls thereby producing a second cross-sectional area of the transition area which is generally elongated and of planar symmetry. The flow of liquid metal from the transition …
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 April 25, 1995 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2017.
- 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.