Osteogenesis promotion with use of vitamin d derivatives
CA 2010982 C · Owner: Matsumoto, Toshio · Inventors: Nishii, Yasuho; Matsumoto, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An osteogenesis promotion with use of a vitamin D derivative of the formula:, (see formula I) wherein R1, R2 and R3, which may be the same or different each represents a hydrogen atom or a hydroxyl group; and R4 is a hydrogen atom or a lower alkyl group having 4 - 6 carbon atoms that may or may not be substituted by a hydroxyl group, are disclosed. A pharmaceutical composition comprising the above derivatives is useful as a therapeutic agent for osteoporosis.
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 27, 1990 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2012.
- 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.