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Expired Canadian patentCanada

Mineral filled rubber composites

CA 1284405 C · Owner: Dow Corning Corporation · Inventors: Collins, Warde Thomas

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

A reinforced rubber composite which comprises a vulcanized, or vulcanizeable, rubber matrix material mineral, filler dispersed in the rubber matrix material and a mixture, of at least two silanes where the first silane (a) contains at least one alkenyl radical, and the second silane (b) contains at least one radical with aromatic character such as a phenyl radical. The invention also relates to mineral fillers treated with said mixture of at least two silanes.

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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 28, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2008.
  • 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 25, 1986
GrantedMay 28, 1991
Term endedMay 28, 2008
Patent numberCA 1284405 C
Classification (IPC)C08L23/04 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 25, 1986Patent grantedMay 28, 1991Term endedMay 28, 2008

Sources & verification

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