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Expired Canadian patentCanada

Method of manufacturing an external electrically conducting metal pattern

CA 1062071 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Beek, Leendert K.H.; Flinsenberg, Christiaan F.W.; Spiertz, Elisabeth J.

CIPO record

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

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Abstract From the Canadian patent

A method of manufacturing electrically conducting metal patterns by means of photosensitive material comprising a dispersion of an organic photosensitive compound in an organic binder in which an organic photosensitive compound is chosen which is soluble in a solvent in which the binder is soluble or can swell, while at least one of the treating liquids comprises one or more solvents which can attack the binder.

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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 September 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedSeptember 11, 1979
Term endedSeptember 11, 1996
Patent numberCA 1062071 A
Classification (IPC)G03C1/62 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 11, 1979Term endedSep 11, 1996

Sources & verification

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