Polypeptides for cosmetic formulations
CA 1095419 A · Owner: Redken Laboratories, Inc. · Inventors: Gumprecht, Janet A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cosmetic preparations for application to keratinous tissues, such as hair, nails or skin are provided wherein such cosmetic preparations consist of an aqueous solution having a pH from about 2.5 to about 9, said aqueous solution containing not less than about 0.1% by weight polypeptide including a cosmetically effective amount of polypeptides predominately having two sterically unhindered positive charges which polypeptides have the formula:, In this formula n is an integer sufficient to provide a molecular weight of the polypeptide of from about 700 to about 1600; each R1 is independently a side group attached to the alpha carbon of a naturally occurring amino acid; and R2 is selected from …
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
- Granted February 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- 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.