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Expired Canadian patentCanada

Fluorocarbon polymer compositions

CA 1046359 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Vary, Eva M.; Vassiliou, Eustathios

CIPO record

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Abstract From the Canadian patent

Fluorocarbon polymer coating compositions containing, (a) a fluorocarbon polymer and, (b) a polymer which depolymerizes and whose, depolymerization products vaporize at the, fluorocarbon polymer fusion temperature give films with greater density and less porosity when applied to cookware.

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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 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 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—
GrantedJanuary 16, 1979
Term endedJanuary 16, 1996
Patent numberCA 1046359 A
Classification (IPC)B32B7/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJan 16, 1979Term endedJan 16, 1996

Sources & verification

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