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Expired Canadian patentCanada

Hair care composition containing modified aminoalkyl substituted polydiorganosiloxane

CA 1302289 C · Owner: Lane, Thomas Howard · Inventors: Kohl, Gretchen Sutton; Lane, Thomas Howard

CIPO record

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Abstract From the Canadian patent

Abstract Hair care uses of polydiorganosiloxanes containing aminoalkyl group modified by alkoxycarbonylalkyl substituents are described. The modified aminoalkyl silicones exhibit improved deposition on hair and can be formulated into shampoos, conditioners, rinses, creams gels, aerosol foams or, sprays, and permanent waving products.

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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

  • Granted June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 22, 1987
GrantedJune 2, 1992
Term endedJune 2, 2009
Patent numberCA 1302289 C
Classification (IPC)A61K8/89

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 22, 1987Patent grantedJune 2, 1992Term endedJune 2, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.