Vitamin d3 derivatives and remedies using the same
CA 2476679 A1 · Owner: Miura, Daishiro · Inventors: Takenouchi, Kazuya; Manabe, Kenji; Miura, Daishiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vitamin D~3 derivatives represented by the following general formula (1) or pharmaceutically acceptable solvates thereof: (1) wherein R represents hydrogen or methyl; and A represents a single bond -CH~2-, -CH=CH-, -CH~2-, CH=CH-, -CH=CH-CH=CH- -C.ident.C- or -CH~2-C.ident.C-, provided that the case wherein R is hydrogen, A is -CH~2-, the configuration at the 1-position is (S) and the configuration at the 3-position is (R) is excluded. These compounds are usable as the active ingredients of remedies for osteoporosis malignant , tumor, psoriasis, parathyroid hyperfunction inflammatory respiratory disease, rheumatoid arthritis diabetes mellitus, hypertension, hair loss acne, dermatitis, …
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
- Filed February 19, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2025.
- 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.