Transdermal administration of huperzine
CA 2389865 A1 · Owner: Xiong, Weihong · Inventors: Patel, Dinesh C.; Xiong, Weihong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a composition of transdermally administered huperzine for improving memory and cognitive function. In one aspect huperzine is delivered in a sufficient amount to achieve and maintain a blood plasma Huperzine level of about 0.5 ng/mL to about to 30 ng/mL. Huperzine may be delivered by itself, or in combination with other positive health promoting substances, such as vitamins, minerals other cholinesterase inhibitors, etc. Various formulations for the transdermal delivery of huperzine are disclosed and may include selected penetration enhancers.
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 3, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 3, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 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.