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Expired Canadian patentCanada

Process for improving polymer fiber properties and fibers produced thereby

CA 1248709 A · Owner: Intera Company, Ltd. · Inventors: Dyer, Michael E.

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure, A method is provided for treating polyester and, acrylic polymer fibers or fibrous structures made thereof to permanently improve the antistatic, hygroscopic dye, receptive, soil release, inter-fiber adhesion and bonding properties of the fibers and structures. The method involves contacting the fibers with an aqueous solution containing at least one unsaturated monomer and having an acid pH and a temperature between about 60°C and about 100°C. After allowing the solution to uniformly disperse among the fibers, so that the monomer intimately contacts the fiber surfaces, polymerization of the monomer on the fiber surfaces is initiated by a polymerization initiator …

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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 January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 20, 1983
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1248709 A
Classification (IPC)D06M14/08 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedJune 20, 1983Patent grantedJan 17, 1989Term endedJan 17, 2006

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