Biotherapeutic cell-coated microspheres
CA 2135999 C · Owner: National Research Council Of Canada · Inventors: Armstrong, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A living skin replacement for the treatment of partial-and full-thickness skin injuries such as burns and other wounds, consists of a slurry of cell-coated microspheres which can be applied to the skin injury in much the same manner as a paste or salve. The skin implant can accommodate contour variations across the often extensive area of a skin injury and does not require the use of stapling, suturing, or other attachment methods. The microspheres can be formed of a variety of materials that are bio-compatible and resorbable in vivo.
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 April 23, 1993 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2015.
- 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.