Compositions containing hyaluronic acid complexes with zinc or cobalt
CA 2027596 C · Owner: Illes, Janos · Inventors: Varkonyi, Viktoria; Stefko, Bela; Neszmelyi, Erzsebet
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to complexes of deprotonated hyaluronic acid with 3d metal ions of the 4th period of the Periodic Table, preferably zinc or cobalt ions and, compositions containing these complexes as active ingredients. The invention also provides a process for the preparation of the complexes, and compositions (both pharmaceutical and cosmetic) containing these complexes as active ingredients. In these compositions zinc or cobalt, hyaluronate preferably is used as active ingredient.
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 20, 1990 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 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.