Nail lacquer for the treatment of onychomycosis
CA 2093895 C · Owner: Wohlrab, Wolfgang · Inventors: Wohlrab, Wolfgang; Wellner, Katrin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a nail lacquer for treating onychomycosis, comprised of a film-forming agent an, antimycotically active substance, and urea wherewith the, antimycotically active substance and the urea are liberated from the lacquer when the lacquer is applied. A preferred formulation comprises cellulose derivative(s) as film former(s), clotrimazole as the antimycotic (present in the amount of 5-30 wt.% based on the weight of the non-volatile components), urea (present in the amount of 15-60 wt.% based on the weight of the non-volatile components) and, dibutyl phthalate as a plasticizer in a solvent mixture, comprised of acetone and ethanol.
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 April 13, 1993 and granted April 15, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 2015.
- 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.