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Expired Canadian patentCanada

Silane microemulsions

CA 1309314 C · Owner: Dow Corning Corporation · Inventors: White, William Curtis; Blehm, Lynne Marie

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

Clear stable micellar solutions comprising: (a) a silane represented by the formulae: i) X4-nSi(RNHaR bYc)n, where X denotes an alkoxy radical with 1 to 6 carbon atoms or an alkoxyalkoxy radical with 2 to 8 carbon atoms or an, alkyl radical with 1 to 6 carbon atoms; Y denotes an acid anion;, n is 1, 2 or 3; R denotes a divalent hydrocarbon radical with 1 to 6 carbon atoms;, R denotes alkyl radicals with 1 to 22 carbon atoms; saturated hydrocarbon radicals containing nitrogen or, unsaturated hydrocarbon radicals containing nitrogen; a is 0, 1 or 2;, b is 0, 1, 2, or 3;, c is 0 or 1; the sum of a + b is 2 or 3 and when the sum of a and b is 3, c is 1, otherwise c is 0; ii) X4-nSi(RPR''3Y)n, …

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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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 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.
FiledJanuary 27, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309314 C
Classification (IPC)B01F17/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 27, 1988Patent grantedOct 27, 1992Term endedOct 27, 2009

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