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Expired Canadian patentCanada

Method and apparatus for control of electroless plating solutions

CA 1112523 A · Owner: Kollmorgen Technologies Corporation · Inventors: Karas, John P.; Funk, Charles R.; Zeblisky, Rudolph J.

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Abstract From the Canadian patent

This invention relates to a method of operating an electroless copper plating bath and avoiding decomposition thereof which comprises measuring the mixed potential of the bath solution and adjusting one or more other bath parameters to maintain the mixed potential within a predetermined range. This invention also relates to an apparatus for measuring the mixed potential and adjusting one or more other bath parameters.

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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 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
  • 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 18, 1977
GrantedNovember 17, 1981
Term endedNovember 17, 1998
Patent numberCA 1112523 A
Classification (IPC)C23C18/16

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedNov 18, 1977Patent grantedNov 17, 1981Term endedNov 17, 1998

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