Novel methylenebisphosphonic acid derivatives
CA 2306080 A1 · Owner: Jarvinen, Tomi · Inventors: Kahkonen, Jouni; Hannuniemi, Ritva; Pohjala, Esko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention are novel halogen substituted methylenebisphosphonic acid anhydrides ester anhydrides, amide anhydrides, and ester amide anhydrides processes for the preparation of these novel compounds, as well as pharmaceutical preparations comprising these novel compounds.
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 October 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2020.
- 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.