Spray gel base and spray gel preparation
CA 2012791 C · Owner: Okuno, Yoshihide · Inventors: Miyazaki, Takashi,; Okuno, Yoshihide; Kamishita, Takuzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a spray gel base having an excellent spread-stick property which is, prepared by thickening a 0.2 - 1.5 % by weight aqueous solution of carboxyvinyl polymer with a water-soluble basic substance, followed by adjusting the viscosity thereof with a viscosity adjustor within the range of 500 - 5,000 centipoise so that the particle size distribution of spray after spraying is over 80 % in the area of 20 - 100 µm and to a spray gel preparation having an excellent spread-stick property, which is prepared by mixing an active medicament with said spray gel base.
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 22, 1990 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.