Quinazoline derivatives
CA 2215732 C · Owner: Zeneca Limited · Inventors: Gibson, Keith Hospkinson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns quinazoline derivatives of the formula (I) wherein n is 1, 2 or 3 and each R2 is independently halogeno trifluoromethyl or (1-, 4C)alkyl; R3 is (1-4C)alkoxy; and R1 is di-(1-4C)alkylamino-(2-4C)alkoxy pyrrolidin-1-yl-(2-4C)alkoxy, piperidino-(2-4C)alkoxy morpholino-(2-, 4C)alkoxy, piperazin-1-yl-(2-4C)alkoxy 4-(1-4C)alkylpiperazin-1-yl-(2-, 4C)alkoxy imidazol-1-yl-(2-4C)alkoxy, di-(1-4C)alkoxy-(2-4C)alkoxylamino-(2- 4C)alkoxy, thiamorpholino-(2-4C)alkoxy 1-oxothiamorpholino-(2-4C)alkoxy or , 1,1-dioxothiamorpholino-(2-4C)alkoxy and wherein any of the above-mentioned R1 substituents comprising a CH2 (methylene) group which is not attached to a N or O atom optionally …
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 April 23, 1996 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2018.
- 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.