Compounds
CA 1339128 C · Owner: Hardern, David Norman · Inventors: Cooper, Martin Edward; Donald, David Keith; Hardern, David Norman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula I, (see fig. I), in which R1 and R2 R3 and R4 and R5, and R6 represent a carbon-carbon bond or two hydrogen atoms;, R2 additionally represents alkyl; R7, R8 and R9 represent groups including H or OH, R10 has various significances including alkyl and alkenyl;, X and Y represent groups including O and (H,OH); R14, R15, R16, R17, R18, R19, R22 and, R23 represent H or alkyl; R20 and R21 represent groups including O (H,OH), and (H,O-alkyl), n is 1, 2, or 3 and in addition, Y, R10 and R23, together with the carbon atoms to which they are attached may represent, a neterocyclic ring, (with certain provisos) are described. Processes for making the compounds and pharmaceutical …
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 July 29, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2014.
- 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.