Vitamin d glycosyl orthoesters
CA 1257251 A · Owner: The General Hospital Corporation · Inventors: Holick, Michael F.; Holick, Sally A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound which is biologically active in maintaining calcium and phosphorous metabolism in animals selected from the group consisting of formula (IA) and (IB):, (I) , (IA) (IB), wherein the bond between carbons C-22 and C-23 is single or double; Y is hydrogen, F, -CH3 or -CH2CH3; Z is F, H or X; Y' is H, -CH3 or CH2CH3; Z' is F or H; Qa is CF3 or CH2X; Qb is CF3 or CH3; X is selected from the group consisting of hydrogen and -OR1 wherein R1 is hydrogen or an orthoester glycoside radical of the formula (II), (II), where A represents a glucofuranosyl or glucopyranosyl ring; R2 is hydrogen, lower alkyl, aralkyl or aryl;, and R3 is hydrogen or a straight or branched chain glycosidic residue …
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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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 2006.
- 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.