Peripherally active anti-hyperalgesic opiates
CA 2229814 C · Owner: Maycock, Alan L. · Inventors: Lewis, Michael E.; Maycock, Alan L.; Yaksh, Tony L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions and methods using the compositions for treatment of peripheral hyperalgesia are provided. The compositions contain an anti-hyperalgesia effective amount of one or more compounds that directly or indirectly interact with peripheral opiate receptors but that do, not, upon topical or local administration elicit substantial central nervous , system effects. The anti-diarrheal compound 4-(p-chlorophenyl)- 4-hydroxy-N-N-dimethyl-.alpha..alpha.-diphenyl-1-piperidinebutyramide hydrochloride is preferred for use in the compositions and methods.
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 September 12, 1996 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 2018.
- 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.