US5443559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush-tip electrode
Assignee: University of British Columbia
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Filing: 1993-11-24
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Granted: 1995-08-22
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Expires: 2013-11-24
Abstract
Abstract An electrode is used the connecting apparatuses to the skin surface of a living body. It includes a tube having an end and a plurality of hard, resilient wires extending outwardly from the end of the tube. The wires have splayed ends in a brush-tip-like arrangement having an end formed by the spaced-apart wires which is multi-pointed and abrasive.
Inventors
- 👤 Yunquan Chen
- 👤 Charles A. Laszlo
- 👤 Cecil Hershler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/296; A61B5/28; A61B5/282; A61B2562/00; A61B2562/18; A61B2562/182
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
71 words
An electrode used for connecting apparatuses to the skin surface of a living body, the electrode comprising: a conductive tube having an end; and a plurality of hard, resilient, conductive wires extending outwardly from the end of the tube, the wires having spaced-apart ends and being splayed in a brush-tip-like arrangement having an end formed by the spaced-apart ends of the wires, the end of the arrangement being multipointed and abrasive.
Claim 2
Dependent Claim
71 words
An electrode used for connecting apparatuses to the skin surface of a living body, the electrode comprising: a conductive tube having an end; and a plurality of hard, resilient, conductive wires extending outwardly from the end of the tube, the wires having spaced-apart ends and being splayed in a brush-tip-like arrangement having an end formed by the spaced-apart ends of the wires, the end of the arrangement being multipointed and abrasive.
Claim 3
Dependent Claim
15 words
An electrode as claimed in claim 1, wherein there are at least 10 said wires.
Claim 4
Dependent Claim
16 words
An electrode as claimed in claim 1, wherein there are between 20 and 50 said wires.
Claim 5
Dependent Claim
13 words
An electrode as claimed in claim 1, wherein there are 30 said wires.
Claim 6
Dependent Claim
21 words
An electrode as claimed in claim 1, wherein the wires are elastic so as to conform to a rough skin surface.
Claim 7
Dependent Claim
13 words
An electrode as claimed in claim 1, wherein the wires are of tungsten.
Claim 8
Dependent Claim
14 words
An electrode as claimed in claim 1, wherein the wires are of stainless steel.
Claim 9
Dependent Claim
18 words
An electrode as claimed in claim 1, wherein each said wire has a diameter less than 100 μm.
Claim 10
Dependent Claim
20 words
An electrode as claimed in claim 1, wherein each said wire has a diameter of between 20 and 80 μm.
Claim 11
Dependent Claim
17 words
An electrode as claimed in claim 1, wherein each of the wires is 38 μm in diameter.
Claim 12
Dependent Claim
18 words
An electrode as claimed in claim 1, wherein the brush-tip-like arrangement has a diameter less than 2.54 mm.
Claim 13
Dependent Claim
18 words
An electrode as claimed in claim 1, wherein the brush-tip-like arrangement has a diameter less than 1 mm.
Claim 14
Dependent Claim
19 words
An electrode as claimed in claim 1, wherein the wires extend 0.5 mm to 2.55 mm. from the tube.
Claim 15
Dependent Claim
18 words
An electrode as claimed in claim 13, wherein the wires extend 0.7 to 1.5 mm. from the tube.
Claim 16
Dependent Claim
16 words
An electrode as claimed in claim 14, wherein the wires extend 1 mm. from the tube.
Claim 17
Dependent Claim
17 words
An electrode as claimed in claim 14, wherein the tube is a length of medical injection needle.
Claim 18
Dependent Claim
83 words
An electrode for connecting apparatuses to the skin surface of a living body, the electrode comprising: a conductive tube having an end; and at least 10 hard, resilient, conductive wires extending 0.5 mm to 2.5 mm from the tube, the wires each being less than 100 μm in diameter, the wires having ends and being splayed to form a brush-tip-like arrangement less than 2.54 mm. in diameter, the ends of the wires being spaced-apart and forming a multi-pointed, abrasive end on the electrode.
Claim 19
Dependent Claim
83 words
An electrode for connecting apparatuses to the skin surface of a living body, the electrode comprising: a conductive tube having an end; and at least 10 hard, resilient, conductive wires extending 0.5 mm to 2.5 mm from the tube, the wires each being less than 100 μm in diameter, the wires having ends and being splayed to form a brush-tip-like arrangement less than 2.54 mm. in diameter, the ends of the wires being spaced-apart and forming a multi-pointed, abrasive end on the electrode.
Claim 20
Dependent Claim
49 words
An electrode as claimed in claim 17, including between 20 and 50 said wires, the wires being of tungsten and each having a diameter of 20 to 80 μm and the brush-tip-like arrangement having a diameter less than 1 mm. and extending 0.7 to 1.5 mm. from the tube.
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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) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |