Method for treatment of papulo-pustules and comedones of the skin
CA 2179188 A1 · Owner: Kligman, Albert M. · Inventors: Kligman, Albert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Papulo-pustules in the skin of patients suffering from various forms of acne folliculitis and rosacea may be rapidly resolved by a spot therapy which involves topically applying to the exterior surface of the papulo-pustule (pimple) an aqueous solution containing hydrogen peroxide and preferably also at least one fruit acid and/or salicylic acid. A preferred fruit acid is glycolic acid. Both open and closed comedones are also effectively treated by spot therapy with the aqueous solution containing hydrogen peroxide fruit acid and salicylic acid. The solution preferably contains 3 to 6 weight percent hydrogen peroxide 2 to 4 weight percent glycolic acid and 2 to 4 weight percent salicylic …
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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 December 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2016.
- 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.