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Expired Canadian patentCanada

Polyarylate molding compositions

CA 1312156 C · Owner: Kassal, Robert James · Inventors: Kassal, Robert James; Subramanian, Pallatheri Manackal

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

In the instant invention improved blow, moldable polyarylate compositions which yield molded objects having substantially uniform wall thickness throughout are provided by the addition of a small amount of a fibrillatable fluoropolymer resin.

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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 December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.
FiledDecember 6, 1988
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1312156 C
Classification (IPC)C08L67/02 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedDec 6, 1988Patent grantedDec 29, 1992Term endedDec 29, 2009

Sources & verification

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