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Expired Canadian patentCanada

Branched polycarbonates containing 2,4,6-tris(4'-hydroxyaryl)-amino-s-triazines

CA 1296472 C · Owner: Enichem Polimeri S.P.A. · Inventors: Petri, Alberto

CIPO record

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Abstract From the Canadian patent

BRANCHED POLYCARBONATES CONTAINING 2,4,6-TRIS(4'-HYDROX- YARYL)-AMINO-S-TRIAZINES", Abstract of the Disclosure Branched, soluble, high-molecular-weight thermoplas, tic polycarbonates having improved properties and, in, particular, suitable to the fabrication by blow-moulding characterized by the presence in their structure of units deriving from the use in the synthesis of tris(4'-hydroxyaryl)-amino-S-triazines having the formula: wherein R1 and R2, equal to, or different from each other, indicate hydrogen, linear or branched C1-5 alkyl or halogen (in particular, chlorine and bromine).

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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 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
  • 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 9, 1986
GrantedFebruary 25, 1992
Term endedFebruary 25, 2009
Patent numberCA 1296472 C
Classification (IPC)C08G64/12 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJuly 9, 1986Patent grantedFeb 25, 1992Term endedFeb 25, 2009

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