The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 1994
Filed:
Sep. 30, 1992
John L Haynes, Chapel Hill, NC (US);
Becton Dickinson and Company, Franklin Lakes, NJ (US);
Abstract
An iontophoresis system includes an iontophoretic drug delivery device for placement against the skin of a patient and having a pair of electrodes, and a circuit for delivering and controlling the current and voltage provided to the electrodes. The current and voltage controlling circuit includes a power supply for generating a voltage or current, an intermediary storage device and a first switching circuit interposed and coupled to the power supply and the intermediary storage device. The intermediary storage device is selectively coupled to the drug delivery device through a second switching circuit or device. Energy from the power supply is transferred and stored in the intermediary storage device for later delivery to the transdermal drug delivery device. In this way, should a component of the circuit fail, the energy or power delivered to the drug delivery device is interrupted or maintained at least equal to a predetermined safe level to avoid damage or injury to the patient's skin.