Hair growth
CA 2521532 A1 · Owner: Houle, Jean-Marie · Inventors: Houle, Jean-Marie; Hunt, David W. C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It has been discovered that photodynamic therapy (PDT) can stimulate an increase in hair count numbers and restore hair growth in areas of hair loss. A method according to the present invention comprises: a) administering an effective and/or sufficient amount of a photosensitizer to the target skin; b) irradiating the target skin with energy comprising one or more wavelength capable of activating said photosensitizer for a time period sufficient to activate the photosensitizer; wherein the there is an increase in hair count numbers in the treated area. In one aspect of the present invention there is , a 2 % or more increase in the number of terminal hairs within 3 months.
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, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2025.
- 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.