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Expired Canadian patentCanada

Method of manufacturing wearing parts for slide locks and product

CA 1084667 A · Owner: Didier-Werke A.G. · Inventors: Hase, Horst; Fehling, Hans R.

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

The present invention provides a wearing part for a slide lock for the discharge opening on vats containing molten metals formed of refractory material clad in a metallic shell said part being made from a fire-resistant refractory concrete poured into the metallic shell and set therein. Such wearing parts include at least one of a slide plate bottom plate, charge, sleeve and discharge sleeve.

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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 September 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 5, 1977
GrantedSeptember 2, 1980
Term endedSeptember 2, 1997
Patent numberCA 1084667 A
Classification (IPC)B22D41/32

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJuly 5, 1977Patent grantedSep 2, 1980Term endedSep 2, 1997

Sources & verification

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