Amide derivatives
CA 1161850 A · Owner: Imperial Chemical Industries Limited · Inventors: Hughes, Leslie R.; Glen, Alasdair T.; Crossley, Neville S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel 3,4-disubstituted-N-acylanilines of the formula:, wherein R1, R2 and ring A are defined in claim 1; wherein R3 is hydrogen or alkyl of up to 4 carbon atoms, or is joined to R5 as stated below; wherein R4 is alkyl of 2 to 4 carbon atoms or has the, formula -CX1X2X3 wherein X1 X2 and X3, which may be the, same or different each is hydrogen, fluorine or chlorine; wherein R5 is hydrogen, hydroxy or alkoxy or acyloxy each of up to 15 carbon atoms, or is joined to R3 to form an oxycarbonyl group such that together with the -N-CO-?part of the molecule it forms an oxazolidinedione group; and wherein R6 is hydrogen or halogen. These compounds possess antiandrogenic activity and are useful for …
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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 February 7, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 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.