Tundishes, unitary tundish linings with flow-control devices, and method of forming the same
CA 2019204 A1 · Owner: Brown, William K. · Inventors: Brown, William K.; Lewis, Thomas W.; Brown, William K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tundish consisting essentially of a rigid metallic outer casing having walls and a bottom at least one permanent layer of heat insulating material adjacent said casing, and a unitary integrally formed expendable inner lining made of a hydrocarbon-free refractory composition and having at least one liquid metal flow control device integrally formed therewith, the lining being chemically compatible with the molten metal to be placed in the tundish. The invention also comprises the unitary integrally formed expendable lining and the method to form the same.
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 June 18, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2012.
- 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.