Evaporative coolant comprising hydrofluorocarbons and/or hydrochlorofluorocarbons
CA 2409461 A1 · Owner: Logsdon, Peter B. · Inventors: Logsdon, Peter B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Evaporative coolants suitable for use as cold spray topical anesthetics containing hydrofluorocarbons and/or hydrochlorofluorocarbons preferably , 1,1,1,3,3-pentafluoropropane either alone or in combination with other hydrofluorocarbon and/or hydrochlorofluorocarbon components. The invention includes a system for cooling skin using the coolant and a device for spraying the coolant, as well as a method of cooling or topically anesthetizing the skin comprising spraying such evaporative coolants thereon.
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 May 11, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2022.
- 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.