Microcapsules having a combined atelocollagen/polyholoside wall
CA 2087955 A1 · Owner: Huc, Alain · Inventors: Huc, Alain; Allard, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to microcapsules having-a combined atelocollagen/polyholoside coagulated wall as well as to a method for producing them. According to the invention the microcapsules, are characterized in that they include a combined atelocollagen/polyholoside wall coagulated by a coagulant, preferably a divalent cation. These microcapsules are preferably prepared by a method which includes laminar-flow extrusion dislocated by individual droplet vibrations falling into a coagulation bath. The presence of the atelocollagen renders the microcapsules biocompatible. They are particularly suitable for the production of cosmetic pharmaceutical, or food compositions.
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 August 2, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2013.
- 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.