Naphthalene derivatives
CA 2427844 C · Owner: Dziadulewicz, Edward Karol · Inventors: Culshaw, Andrew James; Schopfer, Ulrich; Dziadulewicz, Edward Karol
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to naphthalene derivatives of formula (I) wherein X is S, S(O), S(O)2, S(O)2NH, P(O)OCH3 P(O)OH, NH, N(CH3), NHC(O)NH, C(O), C(O)O NHC(O), CH(OH), CH=N, CH=CH, CH2NH, C(=NH); R1 is aryl or heteroaryl; R2 is hydrogen, OR4 or NR5R6 and the other variables are as defined in the description, and the preparation thereof. The compounds of formula (I) are useful as pharmaceuticals in treating or preventing a disease or condition in which cannobinoid receptor activation plays a rôle or is implicated. (I)
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 22, 2001 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2023.
- 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.