(1,2,3,4-tetrahydro-9-acridinimino)cyclohexane carboxylic acid and related compounds, a process for their preparation and their use as medicaments
CA 2019717 C · Owner: Martin, Lawrence Leo · Inventors: Martin, Lawrence Leo; Payack, Joseph Francis; Ong, Helen Hu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are described compounds of the formula where, X is hydrogen, loweralkyl, loweralkoxy or halogen; R when present is hydrogen, loweralkyl or arylloweralkyl:, R1 is hydrogen, loweralkyl or arylloweralkyl: and R2 when present is hydrogen or loweralkyl: which compounds are useful for alleviating various memory dysfunctions characterized by a decreased cholinergic function such Alzheimer's disease.
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 June 25, 1990 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2012.
- 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.