Anti-ulcer pyridyloxy derivatives, their preparation and uses
CA 2092111 A1 · Owner: Fukumi, Hiroshi · Inventors: Kojima, Koichi; Tabata, Kelichi; Fukumi, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I): (I), wherein: R1 is a cyclic amino group or a, dialkylamino group; R2 is a group of formula -NHCHR3R4, wherein R3 and R4 are each alkyl aryl or aralkyl, or together form a cycloalkyl group or, R2 is an aromatic heterocyclic group or a group of, formula -B-S(O)m-R5, wherein R5 is a substituted alkyl group, or an aromatic heterocyclic group; B is an alkylene or alkylidene group; m is 0, 1 or 2; A is a group of formula -CH=CH- or -(CH2)n-, where n is 1 2 or 3; and salts thereof have valuable anti-ulcer activity.
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 March 22, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2015.
- 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.