Novel steroid derivatives
CA 2014759 C · Owner: Hisamitsu Medical Co. Ltd. · Inventors: Sato, Susumu; Komoto, Teruo; Okawa, Junji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Steroid derivatives represented by formula (I) are disclosed. (see formula I), wherein R is a hydrogen atom a halogen atom, a hydroxy, group, or a group -OCOR1 wherein R1 is (a) a linear or, branched alkyl group which may be substituted by a halogen atom or a cycloalkyl group, (b) a cycloalkyl group, or (c) an aryl group. The compounds are useful for curing or alleviating inflammation or rheumatism.
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 April 18, 1990 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 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.