.delta.15-steroid
CA 1069885 A · Owner: Schering Aktiengesellschaft · Inventors: Annen, Klaus; Hofmeister, Helmut; Steinbeck, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides .DELTA.15-steroids of the general formula I, (I), in which R1 represents a hydrogen atom or a trialkylsilyl or acyl group, R2 represents an ethynyl, chlorethynyl or propynyl group and X represents an oxygen atom or a grouping of the formula or NOR4, in which R3 represents a hydrogen atom or an acyl group and R4 represents a hydrogen atom or an acyl alkyl, cycloalkyl or tetrahydropyranyl group. The compounds of the present invention possess valuable steroid hormone properties and can be used as pharmaceutics.
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.