Denture adhesive compositions
CA 2284186 C · Owner: Liang, Nong · Inventors: Liang, Nong; Rajaiah, Jayanth; Gilday-Weber, Kimberly Ann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a denture adhesive composition comprising a partial salt of a lower alkyl vinyl ether-maleic acid copolymer wherein the partial salt comprises a cationic salt function consisting essentially of: from about 0.01 % to about 10 % of ferric iron cations; and from about 0.1 % to about 75 % of divalent and/or monovalent metal cations selected from the group consisting of zinc, calcium, magnesium, potassium, sodium ammonium, and mixtures thereof. , The compositions may also comprise at least one non-adhesive self-supporting layer.
Read the whole patent
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
- Filed March 23, 1998 and granted December 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.