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Expired Canadian patentCanada

Producing substrates coated with inorganic films by plasma enhanced chemical vapor deposition

CA 1269637 C · Owner: American Cyanamid Company · Inventors: Beetz, Charles Pershing Jr.; Stevens, Ward Charles

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Abstract From the Canadian patent

Radio frequency conductive substrates comprising e.g. plates or fibers of conductive materials such as carbon and a thin, uniform firmly adherent film deposited by plasma assisted chemical vapor deposition onto the radio frequency excited substrate, and apparatus for their production. Composites comprising the coated substrates and a continuous matrix of a ceramic or an organic polymer are also disclosed.

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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 May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 14, 1985
GrantedMay 29, 1990
Term endedMay 29, 2007
Patent numberCA 1269637 C
Classification (IPC)C23C16/22 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedMarch 14, 1985Patent grantedMay 29, 1990Term endedMay 29, 2007

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