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Expired Canadian patentCanada

Method and compositions for treating dental structures

CA 1290252 C · Owner: Maurer, Gerald L. · Inventors: Maurer, Gerald L.

CIPO record

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Abstract From the Canadian patent

Abstract, Novel methods and dental compositions for treating dental structures, such as teeth and subgingival structures are disclosed. Uniquely, the dental compositions contain metal complexes which are characterized as having an unique aqueous proton induced dissociation property represented by a sigmoidally-shaped curve on a cartesian coordinate plot of the negative log of the metal ion concentration versus the negative log of the hydrogen ion concentration. This unique dissociation property enables the metal complexes to release therapeutic metal ions in the oral cavity for forming metal coordination complexes or salts within the dental structures. The formation of such complexes or …

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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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 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.
FiledOctober 30, 1986
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290252 C
Classification (IPC)A61K6/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 30, 1986Patent grantedOct 8, 1991Term endedOct 8, 2008

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