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Expired Canadian patentCanada

Process for the quasi-ionic polymerization of acrylic acid derivatives

CA 1315467 C · Owner: Reetz, Manfred T. · Inventors: Ostarek, Ralph; Reetz, Manfred T.; Piejko, Karl-Erwin

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Abstract From the Canadian patent

Process for the quasi-ionic polymerization of acrylic acid derivatives, Abstract, In the process according to the invention for the quasi-ionic polymerization of acrylic acid derivatives in organic solvents with initiators and zinc halides the zinc halides are dissolved in the acrylic acid derivatives to be ppolymerized and the other components of the polymerization mixture are combined with this solution. Le A 24 937 -foreign countries

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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 March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 18, 1987
GrantedMarch 30, 1993
Term endedMarch 30, 2010
Patent numberCA 1315467 C
Classification (IPC)C08F20/12

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 18, 1987Patent grantedMarch 30, 1993Term endedMarch 30, 2010

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