Oral transmucosal delivery of drugs or any other ingredients via the inner buccal cavity
CA 2333156 A1 · Owner: Acharya, Ramesh N. · Inventors: Acharya, Ramesh N.; Baker, Joseph L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device and method for the oral transmucosal delivery of active substances to the oral cavity utilizing an unplasticized polyvinyl pyrrolidone polymer (PVP) as the primary mucoadhesive. The device is applied and adheres to the mucosa of the oral cavity without causing side effects or leaving an unpleasant taste. Preferably the device is a bilayer tablet having a mucoadhesive layer and an overlying active substance containing layer. The mucoadhesive layer may contain PVP as the only adhesive or may be combined with other hydrophilic polymeric substances. The active layer also contains a hydrophilic polymer carrier. The layers in the device dissolve and release the active substance …
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 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2022.
- 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.