Water-containing external preparations
CA 2024642 C · Owner: Ss Pharmaceutical Co. Ltd. · Inventors: Narui, Takashi; Kaneko, Tetsuo; Iwasa, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water-containing external preparations are disclosed which contain, as essential ingredients (a) 0.05-1 wt.% of, deprodone propionate and (b) 1-20 wt.% of a polyhydric alcohol. The water-containing external preparations physico-chemically remain stable even when stored over a long period of time, does not have skin irritation and side effects and, exhibit superb curative effects.
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 September 5, 1990 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 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.