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Expired Canadian patentCanada

Polyamide terpolymer

CA 1067647 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Pagilagan, Rolando U.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A terpolyamide resin having components of (1) nylon 66, 612 or 610; (2) nylon 6I or6T (wherein I is an isophthalic acid moiety and T is a terephthalic acid moiety); and (3) nylon 69, 610, 636 or 612 is provided. The terpolyamide is especially resistant to zinc chloride and is useful for making molded articles and extruded shapes such as flexible tubing and wire and cable jackets.

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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 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 4, 1979
Term endedDecember 4, 1996
Patent numberCA 1067647 A
Classification (IPC)C08G69/26

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 4, 1979Term endedDec 4, 1996

Sources & verification

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