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Expired Canadian patentCanada

Electron beam curing of unsaturated polymers containing wax emulsion

CA 1213850 A · Owner: Wiederhold (Hermann) G.M.B.H. · Inventors: Baulmann, Wilhelm L.

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

A curable polymer system is applied to a substrate as a coating and is cured by electron-bombardment there, being added to the polymer system an aqueous emulsion of a waxy material which emulsion disassociates to allow the waxy material to form a barrier to air at the coating surface.

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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 November 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2003.
  • 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 21, 1983
GrantedNovember 12, 1986
Term endedNovember 12, 2003
Patent numberCA 1213850 A
Classification (IPC)C08J3/28 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 21, 1983Patent grantedNov 12, 1986Term endedNov 12, 2003

Sources & verification

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