11 beta-substituted progesterone analogs
CA 1338906 C · Owner: Research Triangle Institute · Inventors: Cook, C. Edgar; Wani, Mansukh C.; Rector, Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A 11.beta.-aryl-19-norprogesterone steroid of the formula:, wherein (i) R1 is H, C1-4 alkyl C2-4 alkenyl, C2-4, alkynyl, OH, OC(O)CH3 or OC(O)R5, wherein R5 is C2-8, alkyl, C2-8 alkenyl C2-8 alkynyl or aryl, R2 is H, R3, is H C1-4 alkyl, C2-4 alkenyl or C2-4 alkynyl R4 is, H, CH3, F or Cl, R6 is H, (CH3)2N CH3O, CH3CO, CH3S, CH3SO, CH3SO2, and X is O or NOCH3; or (ii) R1 and R2 taken together are a carbon-carbon bond and R3, R4, R6 and X are as defined above; or (iii) R1 and R3 taken together are -CH2- or -N=N-CH2-, R2 is H and R4, R6 and X are as defined above; or, (iv) R2 and R3 taken together are =CH2 and R1 R4, R6 and X are as defined above.
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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 11, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.