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Expired Canadian patentCanada

Process and an apparatus for the continuous production of articles or coatings with contours of complicated shape

CA 1257760 A · Owner: Bayer Aktiengesellschaft · Inventors: Barnes, James M.; Grimm, Wolfgang

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 is directed to a process for the continuous production of articles or coatings with contours wherein a liquid material is introduced at one end into the mold cavity formed between at least two travelling continuous shaping faces, said material being cured in the mold cavity and subsequently removed from the mold, characterized in that (i) the travelling faces are moved downwards at least in the region of the material feed, (ii) the stream of material supplied is moved to and fro transversely to the direction of advance of the faces, and (iii) the quantity of material supplied is controlled so as to fill the mold cavity with a uniform coating and an apparatus for use …

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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 July 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 25, 2006.
  • 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 22, 1985
GrantedJuly 25, 1989
Term endedJuly 25, 2006
Patent numberCA 1257760 A
Classification (IPC)B29C41/30 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedMay 22, 1985Patent grantedJuly 25, 1989Term endedJuly 25, 2006

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