Patent US4997418A successfully refreshed from Google Patents.
US4997418A
Expired / Lapsed
US
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Epidermal iontophoresis device
Assignee: CP CHAMBERS
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Filing: 1989-01-09
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Granted: 1991-03-05
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Expires: 2009-01-09
Abstract
Abstract Iontophoresis device capable of being hand held and activated by thumb contact with a positive electrode and scalp skin contact with a negative electrode. The device has a two component housing enclosing an electrical circuit connecting the two electrodes. The circuit utilizes a 9 V battery, two load regulators, two capacitors, a momentary switch and a 2 V-40 V output range DC/DC converter. Alternatively, negative electrodes of varying structure can be plugged into the device to provide multi-purpose application to the scalp and the positive electrode can be separately plugged to the device to free the hand of the treating technician.
Inventors
- 👤 Richard J. DeMartini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/20; A61N1/30; A61N1/303
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
An iontophoresis hand held apparatus for stimulating hair growth and increasing the absorption of an ionic form of a drug through epidermis tissue, the apparatus having a negatively charged applicator electrode and a positively charged electrode, electrically connected to a circuit enclosed within a nonconducting housing, the circuit comprising: a. a battery electrically connected to b. a DC/DC converter with a 2 volt to 40 volt output range, c. a 470 microfarad capacitor in electrical contact with the DC/DC converter, d. a load regulator resistor and a momentary switch electrically connected to the capacitor and e. means for connecting the circuit to the electrodes to produce a voltage differential across the electrodes.
Claim 2
Dependent Claim
112 words
An iontophoresis hand held apparatus for stimulating hair growth and increasing the absorption of an ionic form of a drug through epidermis tissue, the apparatus having a negatively charged applicator electrode and a positively charged electrode, electrically connected to a circuit enclosed within a nonconducting housing, the circuit comprising: a. a battery electrically connected to b. a DC/DC converter with a 2 volt to 40 volt output range, c. a 470 microfarad capacitor in electrical contact with the DC/DC converter, d. a load regulator resistor and a momentary switch electrically connected to the capacitor and e. means for connecting the circuit to the electrodes to produce a voltage differential across the electrodes.
Claim 3
Dependent Claim
34 words
The iontophoresis apparatus according to claim 1 wherein the positively charged electrode is plugged to one end of the housing and the negatively charged electrode is plugged to a second end of the housing.
Claim 4
Dependent Claim
14 words
The iontophoresis apparatus according to claim 2 wherein the negative electrode is dome shaped.
Claim 5
Dependent Claim
51 words
The iontophoresis apparatus according to claim 2 wherein the negative electrode consists of multiple stainless steel balls suspended on stainless steel wire from a plastic housing, the wire electrically connected to a plug which is plugged into the circuit at an end of the housing distal from the positively charged electrode.
Claim 6
Dependent Claim
29 words
The iontophoresis apparatus according to claim 2 wherein the negative electrode consists of a conductive rubber mat connected by a wire to a plastic housing plugged into the circuit.
Claim 7
Dependent Claim
112 words
An iontophoresis hand held apparatus for increasing the absorption of an ionic form of a drug through epidermis tissue, the apparatus having a negatively charged applicator electrode and a positively charged thumb engaging electrode mounted on an exterior surface of a housing, the housing enclosing an electrical circuit comprising; a. a batter electrically connected to b. a DC/DC converter with a 2 volt to 40 volt output range, c. a 470 microfarad capacitor in electrical contact with the DC/DC converter, d. a load regulator resistor and a momentary switch electrically connected to the capacitor and e. means for connecting the circuit to the electrodes to produce a voltage differential across the electrodes.
Claim 8
Dependent Claim
112 words
An iontophoresis hand held apparatus for increasing the absorption of an ionic form of a drug through epidermis tissue, the apparatus having a negatively charged applicator electrode and a positively charged thumb engaging electrode mounted on an exterior surface of a housing, the housing enclosing an electrical circuit comprising; a. a batter electrically connected to b. a DC/DC converter with a 2 volt to 40 volt output range, c. a 470 microfarad capacitor in electrical contact with the DC/DC converter, d. a load regulator resistor and a momentary switch electrically connected to the capacitor and e. means for connecting the circuit to the electrodes to produce a voltage differential across the electrodes.
Claim 9
Dependent Claim
14 words
The iontophoresis apparatus according to claim 6 wherein the battery output is 9 volts.
Claim 10
Dependent Claim
15 words
The iontophoresis apparatus according to claim 6 wherein the applicator electrode is a metal foil.
Claim 11
Dependent Claim
20 words
The iontophoresis apparatus according to claim 6 wherein the housing has a lower and upper housing component which snap together.
Claim 12
Dependent Claim
28 words
The iontophoresis apparatus according to claim 8 wherein the applicator negative electrode has a rounded smooth surface and protrudes from the housing at the end of a stem.
Claim 13
Dependent Claim
29 words
The iontophoresis apparatus according to claim 6 wherein the circuit has a first load regulator resistor and a second load regulator resistor electrically connected in series to the capacitor.
Claim 14
Dependent Claim
20 words
The iontophoresis apparatus according to claim 11 wherein the first load regulator resistor has a 3.3K to 10K ohm resistance.
Claim 15
Dependent Claim
25 words
The iontophoresis apparatus according to claim 11 wherein the second load regulator resistor has about a 50K ohm resistance and serves as a gain control.
Claim 16
Dependent Claim
32 words
The iontophoresis apparatus according to claim 6 wherein there is a first and a second 470 microfarad capacitor in electrical contact with a first and second side respectively of the DC/DC converter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |