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Expired Canadian patentCanada

Method and apparatus for treatment of viral infection

CA 2428970 C · Owner: Silverstone, Leon M. · Inventors: Silverstone, Leon M.

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

An apparatus and method for treating genital herpes or oral herpes viral infections is disclosed, wherein the apparatus delivers electrical stimulation to the skin or mucosa of a patient. The electrical stimulation is applied as a series of electrical pulses having different electrical characteristics. The apparatus may include a housing having at least two electrodes supplied with both AC and DC voltage, and powered by a battery. The electrodes are designed so as to maximize contact with the patient.

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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 November 28, 2001 and granted June 11, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 28, 2001
GrantedJune 11, 2013
Term endedNovember 28, 2021
Patent numberCA 2428970 C
Classification (IPC)A61N1/36 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedNov 28, 2001Patent grantedJune 11, 2013Term endedNov 28, 2021

Sources & verification

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