Percutaneous anaesthesia
CA 2106312 C · Owner: Smith & Nephew Plc · Inventors: Holden, Paul; Sandbank, Barry Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A percutaneous anaesthetic delivery system comprises a skin conformable backing layer, an amethocaine-bearing material and a layer having little or no tendency to absorb amethocaine intermediate the backing layer and the layer of amethocaine bearing material which may be in the form of a film mat or net.
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 March 20, 1992 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2014.
- 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.