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Expired Canadian patentCanada

Melt-moldable fluorine-containing resin composition

CA 1257438 A · Owner: Otsuka Kagaku Kabushiki Kaisha · Inventors: Kawaguchi, Akiyoshi; Tsujikawa, Yozaburo; Tasaka, Takeo

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 fluorine-containing resin composition which comprises a potassium titanate fiber and at least one fluorine-containing resin selected from the group consisting of poly(chlorotrifluoroethylene) copolymer of, tetrafluoroethylene and a copolymerizable monomer chlorotrifluoroethylene-ethylene copolymer tetrafluoro-, ethylene-ethylene copolymer polyvinylidene fluoride and, copolymer of vinylidene fluoride and a copolymerizable monomer.

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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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 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.
FiledNovember 9, 1984
GrantedJuly 11, 1989
Term endedJuly 11, 2006
Patent numberCA 1257438 A
Classification (IPC)C08K7/08 +1 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedNov 9, 1984Patent grantedJuly 11, 1989Term endedJuly 11, 2006

Sources & verification

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