Pharmaceutical compounds
CA 2082839 A1 · Owner: Lilly Industries Limited · Inventors: Tupper, David E.; Fairhurst, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula:, in which each R1 is hydrogen C1-4 alkyl, C1-4 alkoxy, halogen or nitro and n is 0, 1, 2 or 3, R2 is hydrogen, C1-4 alkyl or C2-4 alkenyl R3 and R4 are each hydrogen, C1-4 alkyl optionally substituted phenyl or C6-9, cycloalkyl optionally substituted by 1 to 4 C1-4 alkyl groups, R5 is optionally substituted phenyl tetrahydronaphthyl, phthalimido, saccharinyl glutaramido, C6-10 cycloalkyl optionally substituted with 1 to 4 C1-4 alkyl groups or a phenyl group, or C4-9 heterosubstituted cycloalkyl optionally substituted with 1 to 4 alkyl groups x is 1, 2 or 3, y is 0 or 1 and z is 0 1, 2 or 3; and, salts thereof. The compounds are indicated for use in the treatment of …
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 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2014.
- 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.