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Expired Canadian patentCanada

Curable silicone composition for corrosion protection

CA 1301977 C · Owner: Dow Corning Corporation · Inventors: Zemanek, Charles P.; Be, Anh; Narula, Dipak

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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 composition which provides excellent corrosion protection to metals, particularly ferrous metals which are to be exposed to moisture and/or salt, is disclosed. The composition comprises (I) a reaction product (or blend) of a resinous copolymeric siloxane solution with a liquid organohydrogenpolysiloxane, (II) a hydroxy-functional diorganopolysiloxane and (III) an organosilane. The composition may be cured on metal surfaces, either at room temperature or at elevated temperatures, to provide a strongly adhering corrosion protective coating.

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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 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledNovember 20, 1987
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301977 C
Classification (IPC)C08L83/04 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 20, 1987Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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