USH71H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for indication of iontophoretic drug dispenser operability
Assignee: Alza Corp
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Filing: 1984-08-03
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Granted: 1986-06-03
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Expires: 2004-08-03
Abstract
Abstract An iontrophoretic medical device has a first light of controlled brightness. Iontophoretic contact with skin is measured by current flow and a second light is illuminated in proportion to current flow. Generally, equivalent brightness of the two lights indicates successful iontophoretic contact.
Inventors
- 👤 Paul D. Sorenson
- 👤 Gary A. Lattin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:27
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/20; A61N1/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A medical device for making iontophoretic contact with skin of a patient comprising: a first visual indicator having a first controlled indication level; means for making iontophoretic contact with skin of a patient; means for measuring current flow across the impedance of the patient's skin; a second visual indicator; means for activating the second visual indicator to a indication level indicative of current flow across the impedance of the patient's skin, so that the indication level may be viually compared to the first indication level.
Claim 2
Dependent Claim
85 words
A medical device for making iontophoretic contact with skin of a patient comprising: a first visual indicator having a first controlled indication level; means for making iontophoretic contact with skin of a patient; means for measuring current flow across the impedance of the patient's skin; a second visual indicator; means for activating the second visual indicator to a indication level indicative of current flow across the impedance of the patient's skin, so that the indication level may be viually compared to the first indication level.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein the first visual indicator and the second visual indicator are lights.
Claim 4
Dependent Claim
113 words
In a medical device operating by iontophoretic contact with the skin, the improvement comprising: a first control light which is constantly illuminated to a control brightness; means for making iontophoretic contact with skin of a patient; means for measuring iontophoretic current flow across the impedance of the patient's skin; and means electrically connected to the means for sensing current flow for determining a level of satisfactory current flow; a second indicator light; and means responsive to the means for sensing current flow for illuminating the second light, such that a satisfactory level of current flow results in an illumination of the second light generally visually equivalent to the illumination of the first light.
Claim 5
Dependent Claim
113 words
In a medical device operating by iontophoretic contact with the skin, the improvement comprising: a first control light which is constantly illuminated to a control brightness; means for making iontophoretic contact with skin of a patient; means for measuring iontophoretic current flow across the impedance of the patient's skin; and means electrically connected to the means for sensing current flow for determining a level of satisfactory current flow; a second indicator light; and means responsive to the means for sensing current flow for illuminating the second light, such that a satisfactory level of current flow results in an illumination of the second light generally visually equivalent to the illumination of the first light.
Claim 6
Independent Claim
98 words
A method of iontophoretic treatment of a human patient comprising the following steps: providing a device for making iontophoretic contact with the skin; providing a first light of a constant control brightness; providing a second light electrically connected with the device for iontophoretic contact such that brightness of a light indicates the quality of the contact with the skin; comparing the brightness of the second light with the brightness of the first light; and determining, based upon general equivalence of the brightness of the first and second lights that proper iontophoretic contact with the skin has been achieved.
Claim 7
Independent Claim
98 words
A method of iontophoretic treatment of a human patient comprising the following steps: providing a device for making iontophoretic contact with the skin; providing a first light of a constant control brightness; providing a second light electrically connected with the device for iontophoretic contact such that brightness of a light indicates the quality of the contact with the skin; comparing the brightness of the second light with the brightness of the first light; and determining, based upon general equivalence of the brightness of the first and second lights that proper iontophoretic contact with the skin has been achieved.
References Cited (Backward Citations)
US3870034A
Cited
US4109645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |