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Expired Canadian patentCanada

Process for the deformation treatment of hair, in particular human hair, that is wound onto a body, and an apparatus for carrying out the process

CA 1308621 C · Owner: Schwan, Annette · Inventors: Schwan, Annette; Zang, Rupert

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Abstract From the Canadian patent

A process for the optimal hair deformation treatment of hair e.g. human hair, that has been wound onto a roller the, deformation of the roller body that takes place during the hair deformation treatment being detected and passed as measured values to a measured value processing system this, system then comparing at least one preset measured value characteristic, which corresponds to an optimal course of the treatment, with the values that are measured and which, indicates agreement thereof. In addition an apparatus for, carrying out the process is also described.

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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, 1988
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308621 C
Classification (IPC)G01L5/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedDec 22, 1988Patent grantedOct 13, 1992Term endedOct 13, 2009

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