3h,7hthiazolo3,4-apyridines with antiasthmatic and a antiinflammatory actions on the respiratory tract
CA 2084669 C · Owner: F. Hoffmann-La Roche Ag · Inventors: Long, Giorgio; De Cillis, Giampiero; Gandolfi, Carmelo A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) wherein R is an alkyl group; R1 is a cyano carboxy alkoxycarbonyl, aminocarbonyl or hy-, droxylaminocarbonyl group; R2 is substituted or unsubstituted phenyl (C3-C7)-, cycloalkyl, .alpha.-, .beta.- or .gamma.-pyridyl or a benzoheterocyclic ring; R3 is carboxy or carboalkoxy; Y is a group of the formula COOX; -NHCOA; -NCO; -COA; -CONHOR e;, -OCOA; A; -CO-CH2-CO-R f; -NHCSA; -OCSA; (a); X is hydrogen alkyl or a , succinimidyl group; A is a cyclic of acyclic amino group; and n is 1 or 2; having pharmacological characteristics which render them useful in the treatment of inflammatory conditions of the respiratory tract and asthmatic conditions.
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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 4, 1991 and granted October 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 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.