Expired Canadian patentCanada
Organoleptically stable denture cleanser tablets
CA 2176710 C · Owner: Gasman, Robert C. · Inventors: Mazzella, Frank; Synodis, Joseph; Gasman, Robert C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Denture cleanser tablet compositions are disclosed which include a flavoring agent in one layer and a bleaching agent in a second layer. This arrangement avoids deterioration of the tablet flavor and taste during storage.
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 November 2, 1994 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 2, 1994
GrantedJuly 6, 1999
Term endedNovember 2, 2014
Patent numberCA 2176710 C
Classification (IPC)A01N25/34 +1 more
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.