Ester prodrugs of steroids
CA 1310009 C · Owner: Braughler, John Mark · Inventors: Hall, Edward Dallas; Mccall, John Michael; Wierenga, Wendell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula wherein the dotted line between positions C-1 and C-2 means the presence or absence of a double bond;, wherein R1 is CH3 or -C2H5; wherein R2 is H, and R3 is in the .alpha.-position and is -OH -O-alkyl(C1-C12), -O?alkyl(C1-C12), =O?aryl -C?N(R)2, or -O?OR7, wherein aryl is furyl thienyl, pyrrolyl, or pyridyl wherein each of said hetero moiety is optionally substituted with one or two (C1-C4)alkyl groups or aryl is -(CH2)f-phenyl wherein f is 0 to 2 and wherein the phenyl ring is optionally substituted with 1 to 3 groups selected from chlorine, fluorine, bromine, alkyl(C1-C3) alkoxy(C1-C3), thio-, alkoxy(C1-C3), Cl3C- F3C-, -NH2 and -NHCOCH3 and wherein R is …
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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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.