Patent US5337748A successfully refreshed from Google Patents.
US5337748A
Expired / Lapsed
US
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Biosignal electrode
Assignee: University of Ulster
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Filing: 1990-10-11
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Granted: 1994-08-16
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Expires: 2010-10-11
Abstract
Abstract A biosignal electrode 10 which comprises a flexible substrate 1 having an obverse side and a reverse side, the obverse side having printed thereon an electrically conductive layer 2 comprising an ink having electrically conductive particles or mixture of particles therein, the layer in plan comprising a first or sensor end 11, a second or connecting end 12 and an interconnecting portion 13, and the sensor end in plan resembling a hollow figure.
Inventors
- 👤 Eric T. McAdams
- 👤 James A. McLaughlin
- 👤 John McC. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:46
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/259; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215; A61B2562/0217; A61B5/72; A61B5/7203; A61B5/7207
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
100 words
A biosignal electrode, comprising: a flexible substrate having an obverse side and a reverse side, an electrically conductive layer printed on the obverse side and comprising an ink having electrically conductive particles or a mixture of particles therein, the electrically conductive layer in plan view defining a first, sensor end, a second, connecting end, and an interconnecting portion, and means for encouraging a current to flow to peripheral edges of the sensor end, said encouraging means comprising the sensor end in plan view resembling a hollow figure, and the substrate at or near the sensor end being continuous and imperforate.
Claim 2
Dependent Claim
100 words
A biosignal electrode, comprising: a flexible substrate having an obverse side and a reverse side, an electrically conductive layer printed on the obverse side and comprising an ink having electrically conductive particles or a mixture of particles therein, the electrically conductive layer in plan view defining a first, sensor end, a second, connecting end, and an interconnecting portion, and means for encouraging a current to flow to peripheral edges of the sensor end, said encouraging means comprising the sensor end in plan view resembling a hollow figure, and the substrate at or near the sensor end being continuous and imperforate.
Claim 3
Dependent Claim
16 words
A biosignal electrode as claimed in claim 1 wherein the figure is a curved shaped figure.
Claim 4
Dependent Claim
18 words
A biosignal electrode as claimed in claim 1 or claim 2 wherein the figure is a closed figure.
Claim 5
Dependent Claim
14 words
A biosignal electrode as claimed in claim 3 wherein the figure is an annulus.
Claim 6
Dependent Claim
19 words
A biosignal electrode as claimed in any of claims 1 or 2 wherein the particles comprise silver or tin.
Claim 7
Dependent Claim
23 words
A biosignal electrode as claimed in any of claims 1 or 2 wherein the mixture of particles comprises silver/silver salt or tin/tin salt.
Claim 8
Dependent Claim
28 words
An electrode as claimed in any of claim 1 which further comprises an electrolytic gel layer, the conductive layer being interposed between the gel layer and the substrate.
Claim 9
Dependent Claim
21 words
An electrode as claimed in claim 7 wherein the electrolytic gel layer is located on the sensor end of the substrate.
Claim 10
Dependent Claim
20 words
An electrode as claimed in claim 7 or claim 8 wherein the gel layer is located on the sensor end.
Claim 11
Dependent Claim
17 words
An electrode as claimed in any of claim 7 wherein the gel layer comprises a conductive adhesive.
Claim 12
Dependent Claim
34 words
An electrode as claimed in claim 7 wherein an electrically insulating layer is located on the connecting end and on the interconnecting portion and is in substantially co-planar relationship relative to the gel layer.
Claim 13
Dependent Claim
28 words
An electrode as claimed in any of claim 1 wherein means is provided for enabling an electrical connection to be made between the connection end and monitoring equipment.
Claim 14
Dependent Claim
30 words
An electrode as claimed in claim 12 wherein the electrical connection means comprises an electrically conductive snap fastener riveted through the substrate and in electrical communication with the conductive layer.
Claim 15
Dependent Claim
28 words
An electrode as claimed in any of claim 1 wherein an adhesive layer is located on the substrate in substantially co-planar relationship relative to the conductive ink layer.
Claim 16
Dependent Claim
40 words
An electrode as claimed claim 14 wherein the adhesive layer is located on the obverse side of the sensor end of the substrate within the void of the hollow figure and in substantially co-planar relationship relative to the conductive layer.
Claim 17
Dependent Claim
43 words
An electrode as claimed in claim 14 wherein the reverse side has an adhesive element thereon which element extends outwardly relative to the substrate so as to provide an adhesive surface for enabling the electrode to be in dermal contact with a patient.
Claim 18
Dependent Claim
46 words
An electrode as claimed in any of claim 16 wherein the connecting end, the interconnecting portion and that part of the adhesive element in register with the connecting end and the intermediate portion are movable relative to the remainder of the adhesive element when in use.
Claim 19
Dependent Claim
13 words
An electrode as claimed in claim 1 wherein the substrate is electrically conductive.
Claim 20
Dependent Claim
22 words
An electrode as claimed in claim 1 wherein the mixture of particles comprises silver/silver chloride is a ratio of 9:1 by weight.
Claim 21
Dependent Claim
20 words
An electrode as claimed in claim 1 wherein the conductive layer has a thickness of between 5 and 15 microns.
Claim 22
Dependent Claim
22 words
An electrode as claimed in claim 1, wherein an outer edge of the sensor end is roughened to increase a perimeter-to-area ratio.
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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) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |