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Expired Canadian patentCanada

Agent for preventing corrosion on ceramic surfaces

CA 1310876 C · Owner: Hoechst Aktiengesellschaft · Inventors: Ulrich, Hannsjorg; Westermann, Lothar

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

An agent for preventing corrosion on ceramic surfaces Abstract of the disclosure:, An agent is described for preventing corrosion on surfaces produced from molten silicates, the agent containing a fluorine compound which is at least sparingly soluble in aqueous media.

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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 December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
  • 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 28, 1988
GrantedDecember 1, 1992
Term endedDecember 1, 2009
Patent numberCA 1310876 C
Classification (IPC)C23F11/06 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 28, 1988Patent grantedDec 1, 1992Term endedDec 1, 2009

Sources & verification

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