US3989036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biophysical electrode
Assignee: Dia Medical System Co Ltd
•
Filing: 1975-04-02
•
Granted: 1976-11-02
•
Expires: 1995-04-02
Abstract
Abstract An electrode comprising a discoid, hard and porous insulating member and a conductive electrode member connected with a lead wire and closely adhering to one side of said insulating member, wherein all of these components excluding the area of the exterior of said insulating member that comes in contact with the skin are covered with a housing and said insulating member is impregnated with a solution of chloride.
Inventors
- 👤 Soichiro Sasamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:51
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/282; A61B5/251; A61B5/257; A61B5/263; A61B5/265; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
A biophysical electrode, comprising: a porous, water-permeable, ceramic, insulating member of disclike shape adapted to be impregnated with a conductive liquid, said member having a portion of one surface thereof adapted to be placed in surface-to-surface contact with body tissue; a silver coating film deposited directly on and covering the entire surface of said member except said surface portion thereof, said silver film defining an electrode; an insulating housing encapsulating and in air-tight contact with said silver film, said housing having an opening exposing said surface portion of said member; and an electrical conductive lead in electrical contact with said silver film and extending through the housing.
Claim 2
Dependent Claim
107 words
A biophysical electrode, comprising: a porous, water-permeable, ceramic, insulating member of disclike shape adapted to be impregnated with a conductive liquid, said member having a portion of one surface thereof adapted to be placed in surface-to-surface contact with body tissue; a silver coating film deposited directly on and covering the entire surface of said member except said surface portion thereof, said silver film defining an electrode; an insulating housing encapsulating and in air-tight contact with said silver film, said housing having an opening exposing said surface portion of said member; and an electrical conductive lead in electrical contact with said silver film and extending through the housing.
Claim 3
Dependent Claim
18 words
A biophysical electrode as claimed in claim 1 in which said ceramic insulating member is made of alumina.
Claim 4
Dependent Claim
35 words
A biophysical electrode as claimed in claim 2 in which said ceramic insulating member is impregnated with a solution of a chloride selected from the group consisting of potassium chloride, sodium chloride and calcium chloride.
Claim 5
Dependent Claim
28 words
A biophysical electrode as claimed in claim 1 in which said exposed surface portion of said ceramic insulating member has a plurality of integral projections extending outwardly therefrom.
Claim 6
Dependent Claim
38 words
A biophysical electrode as claimed in claim 1 including a conduit connected to said ceramic insulating member and extending through said silver film and said housing and adapted for supplying the conductive liquid to said ceramic insulating member.
Claim 7
Dependent Claim
35 words
A biophysical electrode as claimed in claim 1 wherein said lead is a terminal that projects through the housing and terminates adjacent to the outside thereof and is adapted for electrical connection to a conductor.
Claim 8
Dependent Claim
15 words
A biophysical electrode as claimed in claim 1 wherein said lead is an electrical wire.
Claim 9
Dependent Claim
64 words
A biophysical electrode as claimed in claim 1 in which said ceramic insulating member is a planar disc, said silver film covers the edge and one surface of said disc, the other surface of said disc forming said surface portion, and said housing has a marginal edge portion of the opening thereof overlapping the marginal edge portion of the other surface of said disc.
References Cited (Backward Citations)
US2782786A
Cited
US2895479A
Cited
US3505993A
Cited
US3496929A
Cited
US3508541A
Cited
US3610229A
Cited
US3747590A
Cited
US3848600A
Cited
US3848600B1
Cited
US3882853A
Cited
US3862627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |