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Expired Canadian patentCanada

Device and process for inducing membrane fusion under an electric field

CA 1248045 A · Owner: American National Red Cross · Inventors: Sowers, Arthur E.

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Abstract From the Canadian patent

The present invention discloses a device and process for inducing membrane fusion under an electric field. The process comprises the steps of (a) suspending said membranes in an aqueous buffered medium in a manner so that the membranes are without contact with each other; (b) altering said membranes to a fusogenic state by applying 2-30 pulses of direct current at a rate of 2 to 5 pulses per second in an electrical field strength of about 500-1000 volts/mm in the medium,said pulses having a rapid rise time not exceeding about 10 micro seconds and an exponential decay half time of about 0.2 milli seconds to about 1.2 milliseconds; and (c) thereafter bringing said fusogenic membranes in …

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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 January 3, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 7, 1985
GrantedJanuary 3, 1989
Term endedJanuary 3, 2006
Patent numberCA 1248045 A
Classification (IPC)C12N13/00 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedAug 7, 1985Patent grantedJan 3, 1989Term endedJan 3, 2006

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