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Expired Canadian patentCanada

An antimicrobial composition containing silver compound

CA 1305666 C · Owner: Clariant Finance (Bvi) Limited · Inventors: Mitchell, Stephen Bernard; Edwards, Neil; Pratt, Allin Sidney

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

An antimicrobial composition for topical use or for incorporation into a coating or structural composition comprises an antimicrobial silver compound preferably, silver chloride, deposited on a physiologically inert oxidic synthetic particulate support material in particulate form. A preferred support material is titania containing one or more of the crystalline forms anatase, rutile, and brookite.

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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 July 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 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.
FiledJuly 2, 1987
GrantedJuly 28, 1992
Term endedJuly 28, 2009
Patent numberCA 1305666 C
Classification (IPC)A01N59/16 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 2, 1987Patent grantedJuly 28, 1992Term endedJuly 28, 2009

Sources & verification

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