Orthopedic casts
CA 2173967 A1 · Owner: Larson, Andrew W. · Inventors: Taft, David D.; Greene, Lawrence C.; Dahlen, Burton L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heat-recoverable orthopedic casts include a support which is maintained in an elastically deformed condition by a casting polymer e.g. a polycaprolactone , (PCL) or a side chain crystallizable polymer having a relatively low melting point. The cast is placed around the limb and is then heated. The casting polymer softens and the cast recovers around the limb. A liner is preferably placed between the cast and the limb, especially when the casting polymer is PCL or has a comparable or higher melting point. For high strength casts the , support is preferably an open-mesh knitted fabric which when fully relaxed, contains at most 300 holes per inch2 (at most 45 holes per cm2). Such a …
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 November 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2016.
- 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.