Isoquinolinone derivatives
CA 2054091 A1 · Owner: Kawamura, Masanori · Inventors: Okegawa, Tadao; Kawamura, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Isoquinolinone derivatives of the formula: (I), wherein R1 is hydrogen, halogen C1-4 alkyl C1-4 alkoxy or, a group of formula:, -NR4R5 wherein R4 is hydrogen, C1-4 alkyl or C2-4 alkanoyl and R5 is hydrogen, C1-4 alkyl. or benzyl; R2 is hydrogen or C1-4 alkyl;, R3 is hydrogen or C1-4 alkyl; 1 is 1, 2, 3 or 4;, m is 1 or 2;, n is 1 or 2 and ? is a single bond or double bond and non-toxic acid addition salts thereof and hydrates thereof possess an antagonistic activity against 5-HT3 receptor and are useful, for the prevention and/or treatment of diseases induced when 5-HT acts on 5-HT3 receptors (especially vomiting induced by the administration of an anti-cancer agent).
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 October 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2013.
- 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.