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Expired Canadian patentCanada

Mixtures of polyamides and graft polymers of styrene and acrylonitrile on polybutadiene

CA 1135892 A · Owner: Bayer Aktiengesellschaft · Inventors: Binsack, Rudolf; Brassat, Bert; Nielinger, Werner

CIPO record

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Abstract From the Canadian patent

Polymer compositions comprising amorphous polyamides and graft polymers consisting of polybutadiene and grafted units of styrene and acrylonitrile. The new compositions have outstanding properties such as toughness rigidity and high, tracking resistance which makes them suitable for the production of components in machine construction, of technical apparatus in the manufacture of motor vehicles and in the electrical sector.

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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 November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 15, 1980
GrantedNovember 16, 1982
Term endedNovember 16, 1999
Patent numberCA 1135892 A
Classification (IPC)C08L77/00 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedFeb 15, 1980Patent grantedNov 16, 1982Term endedNov 16, 1999

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