Aerosol preparation for external use
CA 2028811 C · Owner: Kouchiwa, Shozo · Inventors: Seki, Toshimitsu; Iguchi, Tatsuoki; Kouchiwa, Shozo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an aerosol preparation for external use directed primarily for skin cooling in the form of a, sherbet-shaped foam. The aerosol preparation comprises (B) a concentrate based on water alone or a mixture thereof with a lower alcohol, and (A) as a propellant a liquefied petroleum, gas or dimethyl ether at a (A):(B) weight ratio of 95:5 to 50:50. The propellant is contained such that the aerosol has a pressure of 2-5 kg/cm2 at 20°C and the sherbet-like foam effectively cools injured skin and lasts long.
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 16, 1990 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 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.
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.