Water insoluble derivatives of hyaluronic acid
CA 1332235 C · Owner: Genzyme Corporation · Inventors: Fox, Ellen M.; Hamilton, Raymond G.; Watts, Alan E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for making a water insoluble biocompatible gel includes activating HA with an activating agent to form activated HA, and reacting the activated HA with a nucleophile, under conditions producing the water insoluble biocompatible gel. Also a method for making a water insoluble biocompatible film includes providing a biocompatible gel made according to the above method, and drying the gel or compressing the gel under conditions permitting escape of water from the gel. Also, a water insoluble composition including HA is prepared without the use of any bifunctional or polyfunctional nucleophile.
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
- Granted October 4, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 4, 2011.
- 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.