Hair revitalizing tonic composition containing a 2,2-dimethylpropanediol compound and use thereof
CA 2212443 A1 · Owner: Watanabe, Masazumi · Inventors: Fukunishi, Hirotada; Tsuji, Yoshiharu; Magara, Tsunao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a hair revitalizing tonic composition containing a dimethylpropanediol derivative of the formula:, (see fig. I), wherein R1 and R2 are each independently a C1 30 hydrocarbon group which may be substituted, or a five- or six-membered heterocyclic group which contains 1 to 4 heteroatoms selected from oxygen, sulfur and nitrogen atoms and which may be substituted, R3 is hydrogen atom an alkyl group which may be substituted and acyl group, an alkoxycarbonyl group a phenoxycarbonyl group, or a, carbamoyl group which may be substituted and a and b, are each 0 or 1, as well as a method for effecting hair growth promotion, hair growth stimulation or hair loss, prevention in mammals by …
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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 August 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2019.
- 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
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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.