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Expired Canadian patentCanada

Method and apparatus for casting articles

CA 1283767 C · Owner: Skelley, Richard A. · Inventors: Fetsko, Daniel G.; Graham, Lawrence D.; Skelley, Richard A.

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Abstract From the Canadian patent

An improved mold includes an upper mold section having a primary distribution system which is connected with a furnace and a lower mold section which is withdrawn from the furnace on a chill plate. A baffle plate is supported from the primary distribution system. The lower mold section includes a secondary distribution system which is connected in fluid communication with the primary distribution system at separable joints. The secondary distribution system is connected in fluid communication with article molds which are disposed in an annular array. During pouring of molten metal, reaction forces are transmitted to the chill plate from the pour cup through a support post and baffle plate. …

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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 May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 20, 1987
GrantedMay 7, 1991
Term endedMay 7, 2008
Patent numberCA 1283767 C
Classification (IPC)B22C9/00 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 20, 1987Patent grantedMay 7, 1991Term endedMay 7, 2008

Sources & verification

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