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Expired Canadian patentCanada

Process for preparing flowable, stable and hardenable suspensions, and thus-obtained compositions

CA 1331246 C · Owner: Elf Atochem Italia S.R.L. · Inventors: Giudici, Dario; Marciandi, Franco; Binaghi, Marco

CIPO record

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Abstract From the Canadian patent

A process for preparing flowable stable and, hardenable compositions, comprising mixing: a) a liquid basis constituted by at least one polymerizable monomer:, b) a finely ground mineral filler: c) a silanizing agent for the mineral filler; and d) a hydrolysis catalyst for the silanizing agent selected from the ammonium salts of organic acids.

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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 August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 14, 1988
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331246 C
Classification (IPC)C08F2/44 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 14, 1988Patent grantedAug 2, 1994Term endedAug 2, 2011

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