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Expired Canadian patentCanada

Device for manufacturing stones

CA 1316669 C · Owner: Rook, Cornelis · Inventors: Klein, Willem; Rook, Cornelis

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Device for manufacturing stones provided with a frame, with a mould having boundary walls defining moulding rooms inside the mould with a stamp, movable up-and-down arranged above the mould and with a table arranged under the mould. Filling pieces are movable between a first position in, which they are located under the mould and whereby seen in top view, at, least parts of the filling pieces project from the walls for forming recesses, and a second position, in which the filling pieces are located beside the mould, seen in top view. Extensions are connected to the filling pieces, said extensions being movable forward and backward and co-operating with guide means for guiding the filling …

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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 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 6, 1988
GrantedApril 27, 1993
Term endedApril 27, 2010
Patent numberCA 1316669 C
Classification (IPC)B28B23/00 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMay 6, 1988Patent grantedApril 27, 1993Term endedApril 27, 2010

Sources & verification

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