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Expired Canadian patentCanada

Use of solutions of atelocollagen and polyholosides, for example glycosaminoglycans, for the manufacture of microcapsules, microcapsules produced in this way, processes for the manufacture of such microcapsules and cosmetic, pharmaceutical or food compositions in which they are present

CA 2009065 C · Owner: Levy, Marie-Christine · Inventors: Levy, Marie-Christine; Andry, Marie-Christine; Huc, Alain

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to microcapsules with a mixed wall of crosslinked atelocollagen and polyholosides for example glycosaminoglycans, and to processes for the manufacture of the said microcapsules. According to the invention the microcapsules, comprise a mixed wall of crosslinked atelocollagen and polyholosides, for example glycosaminoglycans the , proportion of polyholosides, for example glycosaminoglycans relative to the atelocollagen preferably being between 18 and 50% by weight. These microcapsules can be manufactured either by a process involving interfacial cross-linking or by the extrusion of a laminar flow which is broken up by vibrations into individual droplets which, fall …

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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 January 31, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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.
FiledJanuary 31, 1990
GrantedAugust 24, 1999
Term endedJanuary 31, 2010
Patent numberCA 2009065 C
Classification (IPC)A61K9/50 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJan 31, 1990Patent grantedAug 24, 1999Term endedJan 31, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.