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Expired Canadian patentCanada

Process for the preparation of compression molded materials

CA 1338075 C · Owner: Bayer Aktiengesellschaft · Inventors: Konig, Eberhard; Sachs, Hanns Immo; Larimer, Donald Richard

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

This invention relates to a process for the preparation of compression molded materials comprising compressing a substrate with a binder based on polyisocyanates wherein said, binder comprises polyisocyanates compounds containing at least, two isocyanate reactive hydrogen atoms and alkylene carbonates.

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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 February 20, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2013.
  • 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 18, 1989
GrantedFebruary 20, 1996
Term endedFebruary 20, 2013
Patent numberCA 1338075 C
Classification (IPC)C08L97/02 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJuly 18, 1989Patent grantedFeb 20, 1996Term endedFeb 20, 2013

Sources & verification

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