Phenolic amine depigmenting and antimelanoma agents
CA 2015197 C · Owner: The Governors Of The University Of Alberta · Inventors: Jimbow, Kowichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition useful for treating skin pigmentation melasma and melanoma comprises:, i) a biologically effective amount of derivatives of 4-S-cysteaminylphenyl such as N-acetyl-4-Scysteaminylphenol, .alpha.-methyl-4-S-cysteaminylphenol N,N'-dimethyl-4-S-cysteaminylphenol and 4-S-homocysteaminylphenol; and, ii) a suitable biologically compatible carrier for the selected active compound.
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 23, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.