Patent US5269810A successfully refreshed from Google Patents.
US5269810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patch electrode
Assignee: W.L. Gore and Associates Inc
•
Filing: 1992-06-19
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Granted: 1993-12-14
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Expires: 2012-06-19
Abstract
Abstract A flexible patch electrode for use with living tissue, comprising, in sequential laminar form, a layer of electrically conductive porous polytetrafluoroethylene, a layer of polymeric adhesive, a layer of electrically conductive sheet material having lower resistivity than the layer of porous polytetrafluoroethylene, and an insulating layer. The layer of electrically conductive sheet material is of less length and width than the adjacent layers and is placed so that its edges are not exposed at the edges of the flexible patch electrode.
Inventors
- 👤 John R. Hull
- 👤 Craig D. Lack
- 👤 William P. Mortimer, Jr.
- 👤 Richard A. Staley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/0587
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
121 words
A flexible patch electrode for use with living tissue, comprising, in sequential laminate form, a) a layer of electrically conductive porous polytetrafluoroethylene; and b) a layer of polymeric adhesive, and c) a layer of electrically conductive sheet material of lower resistivity than the layer of electrically conductive porous polytetrafluoroethylene; and d) a layer of electrically insulating material; wherein the layer of electrically conductive sheet material is of less length and width than the layer of electrically conductive porous polytetrafluoroethylene and the layer of electrically insulating material, the layer of electrically conductive sheet material being placed within the patch electrode so that the edges of the layer of electrically conductive sheet material are not exposed at the edges of the patch electrode.
Claim 2
Dependent Claim
121 words
A flexible patch electrode for use with living tissue, comprising, in sequential laminate form, a) a layer of electrically conductive porous polytetrafluoroethylene; and b) a layer of polymeric adhesive, and c) a layer of electrically conductive sheet material of lower resistivity than the layer of electrically conductive porous polytetrafluoroethylene; and d) a layer of electrically insulating material; wherein the layer of electrically conductive sheet material is of less length and width than the layer of electrically conductive porous polytetrafluoroethylene and the layer of electrically insulating material, the layer of electrically conductive sheet material being placed within the patch electrode so that the edges of the layer of electrically conductive sheet material are not exposed at the edges of the patch electrode.
Claim 3
Dependent Claim
37 words
A flexible patch electrode according to claim 1 wherein the layer of electrically conductive sheet material is of at least two orders of magnitude lower resistivity than the resistivity of the layer of electrically conductive porous polytetrafluoroethylene.
Claim 4
Dependent Claim
22 words
A flexible patch electrode according to claim 1 wherein the layer of electrically conductive porous polytetrafluoroethylene is electrically conductive porous expanded polytetrafluoroethylene.
Claim 5
Dependent Claim
19 words
A flexible patch electrode according to claim 1 wherein the electrically conductive porous polytetrafluoroethylene contains an electrically conductive filler.
Claim 6
Dependent Claim
29 words
A flexible patch electrode according to claim 4 wherein the electrically conductive filler is chosen from the group consisting of carbon blacks, platinum, gold, silver, titanium and stainless steel.
Claim 7
Dependent Claim
17 words
A flexible patch electrode according to claim 1 wherein the layer of polymeric adhesive is a thermoplastic.
Claim 8
Dependent Claim
14 words
A flexible patch electrode according to claim 6 wherein the thermoplastic is a fluoropolymer.
Claim 9
Dependent Claim
15 words
A flexible patch electrode according to claim 7 wherein the fluoropolymer is fluorinated ethylene propylene.
Claim 10
Dependent Claim
28 words
A flexible patch electrode according to claim 8 wherein the polymeric adhesive is a conductive polymeric adhesive comprising a mixture of carbon black and the fluorinated ethylene propylene.
Claim 11
Dependent Claim
15 words
A flexible patch electrode according to claim 9 wherein the carbon black is acetylene black.
Claim 12
Dependent Claim
18 words
A flexible patch electrode according to claim 1 wherein the layer of electrically conductive sheet material is metallic.
Claim 13
Dependent Claim
20 words
A flexible patch electrode according to claim 11 wherein the layer of electrically conductive sheet material is a metal foil.
Claim 14
Dependent Claim
15 words
A flexible patch electrode according to claim 12 wherein the metal foil is substantially platinum.
Claim 15
Dependent Claim
15 words
A flexible patch electrode according to claim 12 wherein the metal foil is substantially gold.
Claim 16
Dependent Claim
15 words
A flexible patch electrode according to claim 12 wherein the metal foil is substantially titanium.
Claim 17
Dependent Claim
16 words
A flexible patch electrode according to claim 12 wherein the metal foil is substantially stainless steel.
Claim 18
Dependent Claim
21 words
A flexible patch electrode according to claim 11 wherein the layer of electrically conductive sheet material is a woven wire mesh.
Claim 19
Dependent Claim
49 words
A flexible patch electrode according to claim 1 wherein the layer of electrically insulating material is porous polytetrafluoroethylene which is adhered to the layer of electrically conductive sheet material with an adhesive that seals the porous surface of the layer of electrically insulating material to which it is applied.
Claim 20
Dependent Claim
79 words
A flexible patch electrode according to claim 1 wherein: a) the layer of electrically conductive porous polytetrafluoroethylene is porous expanded polytetrafluoroethylene containing a filler of carbon black; and b) the layer of polymeric adhesive is a mixture of fluorinated ethylene propylene and an electrically conductive filler; and c) the layer of electrically conductive sheet material is platinum foil; and d) the layer of electrically insulating material is porous expanded polytetrafluoroethylene adhered to the platinum foil by a silicone adhesive.
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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) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |