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Expired Canadian patentCanada

Electrophoretic media

CA 1337953 C · Owner: Shorr, Robert · Inventors: Jain, Tikam; Shorr, Robert

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Electrophoretic media based on polymers with novel structures are disclosed. In one preferred embodiment the, polymers are formed by cross-linking polymerization of N,Ndimethylacrylamide with ethyleneglycol methacrylate. In another preferred embodiment, the polymers are formed by cross-linking polymerization of N,N-dimethylacrylamide and hydroxyethylmethacrylate with N,N-dimethylbisacrylamide. - 78 -

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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, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 24, 1989
GrantedJanuary 16, 1996
Term endedJanuary 16, 2013
Patent numberCA 1337953 C
Classification (IPC)G01N27/26 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedApril 24, 1989Patent grantedJan 16, 1996Term endedJan 16, 2013

Sources & verification

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