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Expired Canadian patentCanada

Electrically conductive viscoelastic gel

CA 1107058 A · Owner: Beiersdorf Aktiengesellschaft · Inventors: Piel, Frank; Weidehaas, Gerd; Howe, Bernd

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention relates to a viscoelastic gel particularly suitable for use in electrodes for medical purposes. Thus it is desirable to provide a contact agent which exhibits a generally resistance free transfer of electric current even after an extended time of application and would leave no residues on the skin or give rise to other undesired reactions on the skin. Moreover, the electrodes provided with such agent require only a simple manufacturing technology resulting in a low cost in order to make it possible to use the electrode as a single application article. The specification discloses an electrically conductive, viscoelastic gel containing relative, to the total weight of …

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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.
FiledMay 18, 1978
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107058 A
Classification (IPC)C09K3/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 18, 1978Patent grantedAug 18, 1981Term endedAug 18, 1998

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