Steroid compounds having an oxygen function in the 19- position
CA 1099701 A · Owner: Novartis Pharmaceuticals Canada Inc./Novartis Pharma Canada Inc. · Inventors: Wieland, Peter; Anner, Georg; Ueberwasser, Hellmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 4-10725/1+2/+, Canada, Novel steroid compounds having an oxygen function in the 19-position, Abstract of the Disclosure Novel 19-oxygenated steroids of the 20-spiroxane series of the formula, in which R3 is a lower alkyl radical carrying an oxygencontaining functional group and R4 is two hydrogen atoms or an oxo group, and which carry a double bond or a methylene group in the 6,7-position or carry a lower alkanoylthio group in the 7.alpha.-position, and the corresponding 17.beta.-hydroxy-21-carboxylic acids of the formula, - 1 -, in which R3 is as defined above 3 and which carry a double bond or a methylene group in the 6,7-position as well as salts, thereof and 1,2-dehydro derivatives …
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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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 1998.
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Timeline
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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.