Compositions and their use in lowering intraocular pressure
CA 2029657 C · Owner: Urtti, Arto · Inventors: Virtanen, Raimo; Lammintausta, Risto; Macdonald, Ewen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula:, (see formula I) where X is -CH2-, -CH(CH3)-, -CHR3-CH2- or -CR3=CH- and R1 R2 and R3, which can be the same or different are each H or, CH3 or a stereoisomer or pharmaceutically acceptable salt thereof, and pharmaceutical compositions containing them are, useful for lowering intraocular pressure in a mammal e.g. in, the treatment of glaucoma.
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 9, 1990 and granted June 18, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 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.