Iontophoretic device with reversible polarity
Patent 4406658 Issued on September 27, 1983. Estimated Expiration Date: 
March 6, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 6, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2784715 3215139 3699963 Method of and apparatus for dental anesthesia Therapeutic method of using low intensity direct current generator with polarity reversal Monitoring and stimulation electrode Epidermal iontophoresis device Electrode assembly Device for cutting glass Non-invasive chemical species delivery apparatus and method InventorsAssigneeApplicationNo. 06/241284 filed on 03/06/1981US Classes:604/20, Infrared, visible light, ultraviolet, X-ray or electrical energy applied to body (e.g., iontophoresis, etc.)607/64, Constant level output607/75Galvanic (i.e., battery-like direct current signals)ExaminersPrimary: Cohen, Lee S.Attorney, Agent or FirmInternational ClassesA61N 1/24 (20060101)A61N 1/30 (20060101) A61N 1/32 (20060101) A61N 1/20 (20060101) AbstractAn iontophoretic device in which the polarity of the electrodes is reversible. There is a current source and a pair of electrodes. A polarity control between the current source and the electrodes determines the direction of current flow through and between the electrodes. A timer circuit communicates with the current source and the polarity switching circuit to automatically ramp down the current, switch polarity and then ramp up the current after the polarity has been switched, thereby permitting the iontophoretic process to take place under both electrodes with one application.Other References
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