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Expired Canadian patentCanada

Use of silicone masses to prevent the formation of ice on substrates

CA 1298745 C · Owner: Bayer Aktiengesellschaft · Inventors: Sattlegger, Hans; Achtenberg, Theo

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

Use of silicone masses to prevent the formation of ice on substrates, Abstract of the Disclosure A method of minimizing the adherence of ice on substrates which comprises coating said substrates with a polysiloxane composition which changes into a rubbery elastic material in the presence of water or atmospheric moisture which comprises .alpha..omega.-dihydroxy-polydiorganosiloxane having a viscosity of about 500 to 2,000,000 centipoise at 20°C and a cross-linking agent with or without a hardening catalyst.

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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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 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 19, 1986
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298745 C
Classification (IPC)C09K3/18 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 19, 1986Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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