Difluoresteroids and processes for their manufacture
CA 1069118 A · Owner: Ciba-Geigy Ag · Inventors: Kalvoda, Jaroslav; Biollaz, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel 18,18-difluorosteroids are disclosed of the general formula (Ia), wherein R3 denotes hydrogen or lower alkanoyl R4 denotes hydrogen or lower, aliphatic hydrocarbon and St represents a radical of the partial formula: , or, (ST1) (St2) (St'2), (St3), wherein R5 is an oxo group or a hydrogen atom conjointly with a free or esterifiod hydroxyl group, or denotes two hydrogen atoms R6 is hydrogen or lower alk-, yl, and R7 and R are each hydrogen or methyl. The compounds (Ia) are useful as pharmaceutical intermediates. A number of the compounds (Ia) are physiologically active and possess hormone-like properties.
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 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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.