Chemical compounds
CA 2000337 A1 · Owner: Ed. Geistlich Sohne Ag Fur Chemische Industrie · Inventors: Geistlich, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to delayed release compositions for use in wound healing. The compositions comprise a hydrogel containing one or more gellable proteins peptides or, polysaccharides interspersed with a hydrophilic polymer. The hydrogel is swollen with an aqueous solution containing one or more growth factors, namely epidermal growth factor human, fibroblast growth factor, human insulin-like growth factor and platelet-derived growth factor. The compositions promote continued growth of new tissue while maintaining the sterility of the wound.
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 10, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 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.