Use of piperine and analogues thereof in the prevention of skin cancer
CA 2735844 C · Owner: Oregon Health & Science University · Inventors: Raman, Amala; Lin, Zhixiu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for the use of a compound of formula (I): (see formula I) in which (a) n is 0 1, or 2, m is 2, the two R1s together represent a 3',4'- methylenedioxy group R2 and R3, together with the carbon atoms to which they are attached form a carbon to carbon double bond and when n is 1 or 2, R4 and R5, together with the carbon atoms to which they are attached form a carbon to carbon double bond and R6 is piperidino or (b) n is 1 and (i) m is 3, two R1s together representing 3',4'- methylenedioxy and the other 6'-methoxy; or (ii) m is 2 the R1s being 3'- hydroxy-4'- methoxy; or (iii) m is 1 and R1 is 4'-hydroxy; and R2 to R6 are as defined in case (a) above or (c) n is …
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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 July 13, 1999 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 2021.
- 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.