US4515162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode pad
Assignee: Nitto Denko Corp
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Filing: 1981-09-14
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Granted: 1985-05-07
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Expires: 2001-09-14
Abstract
Abstract An electrode pad comprising a tacky crosslinked hydrogel adhered to an electrode terminal plate, through which electrical signals from the living body can be transmitted to an electric recording apparatus.
Inventors
- 👤 Katsuhiro Yamamoto
- 👤 Katsuo Matsumoto
- 👤 Yoshiyuki Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:51
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; C; C09; C09J; C09J133/00; C09J133/02; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L63/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
An electrode pad consisting essentially a tacky cross-linked electrically conductive hydrogel, wherein said hydrogel comprises at least one of polyacrylic acid and polyacrylic acid salt, water, and a cross-linking compound containing at least two epoxy groups in the molecule.
Claim 2
Dependent Claim
39 words
An electrode pad consisting essentially a tacky cross-linked electrically conductive hydrogel, wherein said hydrogel comprises at least one of polyacrylic acid and polyacrylic acid salt, water, and a cross-linking compound containing at least two epoxy groups in the molecule.
Claim 3
Dependent Claim
34 words
An electrode pad as in claim 1, wherein at least one layer of a woven fabric is provided to support the hydrogel, and the hydrogel is in contact with said at least one layer.
Claim 4
Dependent Claim
28 words
An electrode pad as recited in claim 2, wherein a frame of film is provided on a side of the electrode pad intended for contacting the living body.
Claim 5
Dependent Claim
36 words
The electrode pad as recited in claim 3, wherein the frame is positioned on the fabric layer so as to form a layered structure wherein the layers are in the order of hydrogel, fabric, and frame.
Claim 6
Dependent Claim
24 words
An electrode pad as in claim 2, wherein said hydrogel has a two-layered structure with one layer being a weakly tacky or non-tacky layer.
Claim 7
Dependent Claim
20 words
An electrode pad as in claim 1, wherein the thickness of said hydrogel is from about 0.5 to 10 m.
References Cited (Backward Citations)
US3998215A
Cited
US4237886A
Cited
US4299231A
Cited
US4273135A
Cited
US4391278A
Cited
WO1981000785A1
Cited
WO1981002097A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |