D-homo oxasteroids
CA 1113925 A · Owner: Squibb (E.R.) & Sons, Inc. · Inventors: Grabowich, Paul; Varma, Ravi K.; Cimarusti, Christopher M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel steroids which can be used as anti-, inflammatory agents have the formula, or the 1,2-dehydro derivative thereof; wherein R1 is hydrogen, alkyl-?-O-, aryl-?-0-, halogen or hydroxy; R2 is hydrogen or alkyl; R3 is alkyl; R4 is carbonyl .beta.-hydroxymethylene, .beta.-chloromethylene or .beta.-bromomethylene; R5 is hydrogen, fluorine, chlorine or bromine; R6 is hydrogen, fluorine or methyl; and R7 is hydrogen chlorine or bromine; with the proviso that when R1 is hydroxy, R2 is alkyl; and with the further proviso that when R2 is alkyl, it is the same alkyl group as R3; wherein aryl is phenyl or phenyl substituted with one or two alkyl, alkoxy or halogen groups; and alkyl and alkoxy are …
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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 1998.
- 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.