New 11-benzaldoxime-estradiene derivatives, processes for their production and pharmaceuticals containing these substances
CA 2130516 C · Owner: Bayer Schering Pharma Aktiengesellschaft · Inventors: Oettel, Michael; Elger, Walter; Kaufmann, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel 11-benzaldoxime-estra-diene derivatives of the general Formula I (see formula I) or their pharmaceutically acceptable salts are provided herein as well as processes for their production and pharmaceuticals containing such compounds. In such compound of the general Formula I Z, R1, R2 and R3 are specifically defined. Such compounds show strong antigestagenic effects combined with reduced glucocorticoid activity and thus provide novel uses of such compounds.
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
- Filed August 19, 1994 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.
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.