Anti-tumour agents
CA 1301756 C · Owner: Hughes, Leslie Richard · Inventors: Hughes, Leslie Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A quinazoline of the formula:wherein R1 is alkyl, cycloalkyl, alkenyl alkynyl, alkoxy, alkylthio, aryl, aryloxy arylthio, arylalkyl, halogeno, hydroxy or mercapto or substituted alkyl or alkoxy, wherein R2 is hydrogen alkyl, alkenyl or alkynyl, or substituted alkyl or alkanoyl:, wherein Ar is phenylene naphthylene or heterocyclene which is, unsubstituted or bears one or more substituents; wherein R3 is such that R3 NH2 is an amino acid wherein R4 is hydrogen or alkyl;, wherein R5 is hydrogen or alkyl; and wherein each of R6, R7 and R8 is hydrogen hydroxy, alkyl, alkoxy, alkylthio, alkylamino dialkylamino, phenyl, halogeno, nitro, cyano or amino, or substituted alkyl, alkoxy or alkylthio: …
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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.