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Expired Canadian patentCanada

Oxidizing agent for acidic accelerator

CA 1203720 A · Owner: Omi International Corporation · Inventors: Kinney, Timothy J.; Doty, Warren R.

CIPO record

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Abstract From the Canadian patent

A process for treating a polymeric plastic substrate to render it receptive to electroless plating in a process of the type including the steps of etching the substrate and activating the etched substrate. The present improvement includes the step of accelerating the activated substrate with an improved aqueous accelerating solution containing an aqueous soluble compatible oxidizing agent present in an amount effective to increase the activity of the accelerating solution. The improved accelerating solution inhibits the plating of stop-off coatings and plating racks and is of versatile use.

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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 April 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 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.
FiledDecember 16, 1982
GrantedApril 29, 1986
Term endedApril 29, 2003
Patent numberCA 1203720 A
Classification (IPC)C23C18/30 +2 more

Timeline

Timeline From CIPO dates

1983198619891992199519982001Application filedDec 16, 1982Patent grantedApril 29, 1986Term endedApril 29, 2003

Sources & verification

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