Quinazolines, process for their preparation and pharmaceutical compositions containing them
CA 1252093 A · Owner: Boehringer Ingelheim International Gmbh · Inventors: Renth, Ernst-Otto; Schromm, Kurt; Fugner, Armin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel quinazoline compounds of formula (I), wherein R1 and R2, which may be the same or different represent hydrogen, atoms, or lower alkyl or lower alkoxy groups; and/or of R1 and R2 when in the, 8-position as shown in formula (I) may represent a halogen atom; and/or one of R1 and R2 may represent a fused benzene ring; R3 and R4 which may be the same, or different, represent hydrogen atoms or lower alkyl or lower alkoxy groups; and/or one of R3 and R4 may represent a halogen atom in the 2- 3- or 4-, position as shown in formula (I); and/or one of R3 and R4 may represent a fused benzene ring; one of the pairs of groups R1 and R2 or R3 and R4, being, situated on …
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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.