Autocross-linked hyaluronic acid and related pharmaceutical compositions for the treatment of arthropathies
CA 2258920 C · Owner: Callegaro, Lanfranco · Inventors: O'Regan, Michael; Bellini, Davide; Paparella, Annamaria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compositions containing an autocross-linked form of hyaluronic acid alone or as a first component in mixture with a second component noncross-linked hyaluronic acid and possibly also in combination , with another pharmacologically active substance. These compositions can be used in the treatment of arthropathies due to their unique viscoelastic properties.
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 June 20, 1997 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2019.
- 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.