Denture adhesive composition
CA 2197189 C · Owner: Gasman, Robert C. · Inventors: Clarke, Hal C.; Smetana, Alfred J.; Wong, Eddie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A denture adhesive composition contains a denture adhesive and a pharmacologically acceptable carrier in which the denture adhesive is a salt of a copolymer of maleic acid or anhydride and a 1 to 5 carbon atom alkyl vinyl ether having a specific viscosity of at least 4Ø The denture adhesive composition is used to adhere a denture to the oral mucosa.
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 August 7, 1995 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2017.
- 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.