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Details for Patent: 5,246,418

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Summary for Patent: 5,246,418

Title: Iontophresis system having features for reducing skin irritation
Abstract:An iontophoresis drug delivery system includes a device which is attachable to the skin of an animal and having a drug reservoir, an electrolyte reservoir, and electrodes electrically communicating with the reservoirs and with the skin of the animal. An electronic circuit for controlling the rate or amount of current or voltage applied to the electrodes of the device includes a constant voltage and current generator, and a switching circuit for switching between applying either a constant current to the electrodes or a constant voltage. Current and voltage sensors are attached to the electrodes and provide feedback signals which are compared with predetermined threshold signals to control through feedback the amount of constant voltage and constant current applied to the electrodes.
Inventor(s): Haynes; John L. (Chapel Hill, NC), Sage, Jr.; Burton H. (Raleigh, NC)
Assignee: Becton Dickinson and Company (Franklin Lakes, NJ)
Application Number:07/808,754
Patent Claim Types:
see list of patent claims
Delivery; Compound; Use; Device;

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International Patent Family for Patent: 5,246,418

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia3019992► subscribe
Australia655859► subscribe
Canada2084734► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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