Imidazoquinazoline derivatives
CA 1162537 A · Owner: Hoffmann-La Roche Limited · Inventors: Kaiser, Ado; Chodnekar, Madhukar S.; Kienzle, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Novel imidazoquinazolines of the formula I, wherein R1, R2 and R3 are hydrogen, halogen C1-4-alkyl, C1-4-alkoxy or, C2-5-alkoxyalkyl; or two of R1 R2 and R3 on adjacent carbon atoms, together are methylenedioxy or ethylenedioxy; and R4 and R5 are hydrogen or, C1-4-alkyl and their tautomers, as well as physiologically compatible acid addition salts of such compounds are manufactured. These compounds inhibit the aggregation of the blood platelets and/or the gastric acid secretion and/or have activity on the circulatory system.
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
- Granted February 21, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2001.
- 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.