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Expired Canadian patentCanada

Method and apparatus for altering the charge distribution upon living membranes with functional stabilization of the membrane physical electrical integrity

CA 2303791 C · Owner: Gradient Technologies, Llc · Inventors: Holcomb, Robert R.

CIPO record

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Abstract From the Canadian patent

A method and apparatus for altering the charge distribution upon living membranes with functional stabilization of the membrane physical electrical integrity further comprising a method for using submicroscopic quadripolar, circular, center charged, energy balanced magnetic device in a four (4) magnet array of alternating polarity in which the magnetic poles are separated only by a distance which will allow a magnetic sphere of influence on all adjacent poles to suppress the firing of action potentials of mammalian sensory neurons. The method and apparatus further provides a static magnetic device for production of a magnetic field for treatment of various disorders. Further there …

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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 September 10, 1998 and granted January 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 10, 1998
GrantedJanuary 15, 2013
Term endedSeptember 10, 2018
Patent numberCA 2303791 C
Classification (IPC)A61N2/00 +1 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedSep 10, 1998Patent grantedJan 15, 2013Term endedSep 10, 2018

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