×

Iontophoretic drug delivery system

  • US 6,009,344 A
  • Filed: 07/25/1997
  • Issued: 12/28/1999
  • Est. Priority Date: 07/25/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A controller for use in combination with a patch to form an operable iontophoretic drug delivery system, said controller comprising:

  • electronic circuitry including a circuit for causing a higher rate of discharge of at least one of a plurality of serially-connected cells forming a battery, the battery capable of supplying a current to a device, said circuit having a switch connected to a first electrode of the at least one cell;

    a resistor connected in series with said switch and to a second electrode of the at least one cell, the at least one cell additionally discharging through said resistor when said switch is closed; and

    a reversed bias diode connected between said first electrode and said second electrode of the at least one cell so that said diode is in parallel with said resistor when said switch is closed, and in parallel to the at least one cell, said reversed-biased diode causing the current to bypass the at least one cell when the at least one cell has died.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×