Cyclic aminomethylene bisphosphonate derivatives
CA 2091829 A1 · Owner: Sugioka, Tatsuo · Inventors: Sugioka, Tatsuo; Kitamura, Kazuyuki; Satoh, Ryoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A compound represented by the formula (I) Formula 1, (I), or the formula (II), ( II) wherein R denotes a hydrogen atom or a lower alkyl group; Y and Z may be the same or different and independently denote alkylene groups containing 2-5 carbon atoms in their alkylene chains which may be-substituted with a lower alkyl(s); X denotes a single bond or an alkylene group containing 1-10 carbon atoms in its alkylene chain which may be substituted with a lower alkyl(s); A-O- denotes a residue of a compound having an estrogenic activity and q denotes an integer of 1-3, and physiologically acceptable salts thereof. The above compounds (I) or (II) are useful as a bone …
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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
- Filed March 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2015.
- 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.