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Expired Canadian patentCanada

Converter for refining liquid metals

CA 1164653 A · Owner: Inspiration Consolidated Copper Company · Inventors: Tittes, Allan F.; Larson, Kenneth H.; Britton, Kennith L.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A converter for refining liquid metals having a cylindrical horizontally disposed vessel (1) with a first opening (6) for charging and pouring and a second opening (13) circumferentially and longitudinally displaced from the first opening for exhaust gases to escape is, disclosed. The circumferential displacement is sufficient to prevent liquid metal from pouring from the second opening (13) when the vessel is rotated from a first position for charging materials into the vessel (1) through the first opening (6) to a second position for pouring the contents of the vessel (1) from opening (6). Cool air is provided to a region between the vessel (1) and a jacket (15) surrounding the vessel …

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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

  • Granted April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 16, 1981
GrantedApril 3, 1984
Term endedApril 3, 2001
Patent numberCA 1164653 A
Classification (IPC)F27B7/00 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedNov 16, 1981Patent grantedApril 3, 1984Term endedApril 3, 2001

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.