Benzimidazole vascular damaging agents
CA 2360415 C · Owner: Davis, Peter David · Inventors: Davis, Peter David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
5(6)-substituted benzimidazole-2-carbamates of formula (I) wherein Alk is an alkyl group, X is oxygen, sulphur, sulphinyl sulphonyl, carbonyl (CO), thiocarbonyl (CS) sulphonyloxy, NH, iminomethylene , (C=NH) N-hydroxyiminomethylene, N--alkoxyiminomethylene dialkoxymethylene, 1,3-dioxolan-2yl, 1,1-ethenyl a , group CHR3 or a bond, R1 is hydrogen alkylaminocarbonyl or , alkoxycarbonyl R2 is hydrogen, alkoxycarbonyl, cyanomethyl cyanoethyl, alkoxymethyl or acetoxymethyl. R3 is hydrogen hydroxy, alkoxy or amino, A is an optionally substituted aromatic optionally , substituted heteroaromatic optionally substituted heterocycloalkyl optionally substituted alkyl or optionally substituted …
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 January 14, 2000 and granted March 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2022.
- 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.