US4257424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray transparent medical electrode
Assignee: Conmed Corp
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Filing: 1979-04-30
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Granted: 1981-03-24
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Expires: 1999-04-30
Abstract
Abstract The signal conducting element of a medical electrode of the type bridged to skin by electrolyte and which is required to be X-ray transparent comprises a thin layer of a conductive paint adhered to a relatively thin supporting substrate, said substrate with adhered paint extending remotely from the electrolyte-to-skin interface for circuit connection and protected by a barrier which excludes electrolyte from the remote circuit connection.
Inventors
- 👤 James V. Cartmell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/263; A61B5/265; A61B5/266; A61B5/271; A61B5/273; A61B5/274; A61B5/316; A61B5/318; A61B5/321; A61B5/324; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215; A61B2562/0217; A61B2562/12; A61B2562/125
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A medical electrode comprising: a flexible, resilient, nonconductive sheet member having an outer margin, an adhesive layer on one face thereof, and having an aperture extending therethrough; an X-ray transparent conductor comprising a flexible, elongate, dimensionally stable, nonconductive plastic film, having a surface confronting the opposite face of said sheet member, a layer of conductive silver paint adhered to said surface of said film confronting said sheet member and having a first exposed conductive portion aligned with said aperture and a second exposed conductive portion disposed outwardly beyond said outer margin of said sheet member, and further comprising a continuous insulating covering over said paint between said exposed portions engaging said sheet member and extending beyond said outer margin thereof; a gel filled sponge extending through said aperture engaging said first exposed conductive portion and projecting beyond said one face of said sheet member; and means securing said conductor to said sheet member and said sponge.
Claim 2
Dependent Claim
156 words
A medical electrode comprising: a flexible, resilient, nonconductive sheet member having an outer margin, an adhesive layer on one face thereof, and having an aperture extending therethrough; an X-ray transparent conductor comprising a flexible, elongate, dimensionally stable, nonconductive plastic film, having a surface confronting the opposite face of said sheet member, a layer of conductive silver paint adhered to said surface of said film confronting said sheet member and having a first exposed conductive portion aligned with said aperture and a second exposed conductive portion disposed outwardly beyond said outer margin of said sheet member, and further comprising a continuous insulating covering over said paint between said exposed portions engaging said sheet member and extending beyond said outer margin thereof; a gel filled sponge extending through said aperture engaging said first exposed conductive portion and projecting beyond said one face of said sheet member; and means securing said conductor to said sheet member and said sponge.
Claim 3
Dependent Claim
78 words
The electrode of claim 1 wherein said means securing said conductor to said sheet member and said sponge comprises a cover sheet having an adhesive layer engaging said conductor and said opposite face of said sheet member so as to sandwich said conductor between said cover sheet and said sheet member, said sponge having peripheral portions engaged by the adhesive layer of said cover sheet for retention of said sponge by the adhesive layer of said cover sheet.
Claim 4
Dependent Claim
33 words
The electrode of claim 1 wherein said insulating covering comprises a layer of essentially moisture impermeable material covering said layer of conductive paint between said first exposed portion and said second exposed portion.
Claim 5
Dependent Claim
17 words
The electrode of claim 3 wherein said layer of essentially moisture impermeable material comprises an acrylate resin.
Claim 6
Dependent Claim
36 words
The electrode of claim 3 wherein said sheet member and said layer of essentially moisture impermeable material cooperate to limit migration of gel from said sponge engaging said first exposed portion to said second exposed portion.
Claim 7
Dependent Claim
15 words
The electrode of claim 1 wherein said sheet member comprises a sheet of foamed plastic.
Claim 8
Dependent Claim
14 words
The electrode of claim 1 wherein said sheet member comprises a breathable surgical tape.
Claim 9
Dependent Claim
41 words
The electrode of claim 1 wherein said conductor has a thickness in the range of 1-26 mils, said film having a thickness in the range of 1/2-20 mils and said silver paint having a thickness in the range of 1/2-6 mils.
Claim 10
Dependent Claim
84 words
The electrode of claim 1 including interfitting snap fastener stud and eyelet parts seized together to clasp said second exposed conductive portion of said conductor, said stud part being electrically conductive, said eyelet part being electrically nonconductive, and wherein said conductor is folded to cause said second exposed conductive portion to face in the same direction as said opposite face for electrical engagement with said stud part and to avoid electrical engagement of said second exposed conductive portion with the skin of a patient.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |