Imidazoquinolone derivatives
CA 2011504 C · Owner: Manabe, Haruhiko · Inventors: Ohmori, Kenji; Suzuki, Fumio; Kuroda, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel imidazoquinolone derivative represented by the formula (I);, wherein R1 represents hydrogen alkyl, cycloalkyl, alkenyl, aralkyl, aralkenyl or substituted or unsubstituted aryl; X represents nitrogen or , where R2 is hydrogen hydroxyl, alkyl, cycloalkyl, alkenyl, aralkyl aralkenyl, substituted or, unsubstituted aryl thiol, halogen, substituted or, unsubstituted aromatic heterocyclic group or -(CH2)mCO2R6, where R6 is hydrogen or lower alkyl and m is an integer of 0 to 3; Y represents oxygen or sulfur; R3 represents alkyl cycloalkyl, alkoxyalkly, alkenyl, aralkyl aralkenyl, -(CH2)n-Het where Het is substituted or unsubstituted aromatic heterocyclic group and n is an integer of 1 to 3 or …
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 5, 1990 and granted June 2, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.