Steroids containing a 3, 4 or 6 membered spiranic cycle in 17 position, process and intermediates for preparing the same, use thereof as therapeutic agents and pharmaceutical compositions containing them

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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 January 26, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2016.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.