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Expired Canadian patentCanada

Imaging member containing a copolymer of styrene and ethyl acrylate

CA 1332115 C · Owner: Gardner, Sandra J. · Inventors: Gardner, Sandra J.; Taylor, Michael G.; Loutfy, Rafik O.

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Abstract From the Canadian patent

An imaging system including an migration imaging member comprising a substrate and an electrically insulating softenable layer adjacent the substrate, the softenable layer comprising a fracturable layer of electrically photosensitive migration marking material located substantially at or near the surface of the softenable layer spaced from the substrate, and a copolymer of styrene and ethyl acrylate in at least one layer adjacent the substrate, the copolymer comprising between about 40 and about 80 mole percent styrene, between about 20 and about 60 mole percent ethyl acrylate, the copolymer having a Mn between about 4,000 and about 35,000, a Mw between about 10,000 and about 80,000 a Tg, …

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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 September 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 27, 2011.
  • 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 30, 1988
GrantedSeptember 27, 1994
Term endedSeptember 27, 2011
Patent numberCA 1332115 C
Classification (IPC)G03G5/02 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 30, 1988Patent grantedSep 27, 1994Term endedSep 27, 2011

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