EP0096330A2
Expired / Lapsed
EP
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Electrode for measuring electroretinogram
Assignee: Toray Industries Inc
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Filing: 1983-05-30
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Granted: —
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Expires: 2003-05-30
Abstract
Abstract An electrode for measuring electroretinograms which is made of a lens-shaped material composed of an electroconductive hydrogel and a lead line connected to the lens-shaped material in the portion thereof not falling in contact with an eyeball.
Inventors
- 👤 Hideki Kenjo
- 👤 Kazushige Komaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/297
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
35 words
An electrode for measuring electroretinograms, which comprises a lens-shaped material composed of an electroconductive hydrogel and a lead line connected to the lens-shaped material in the portion thereof not falling in contact with an eyeball.
Claim 2
Dependent Claim
35 words
An electrode for measuring electroretinograms, which comprises a lens-shaped material composed of an electroconductive hydrogel and a lead line connected to the lens-shaped material in the portion thereof not falling in contact with an eyeball.
Claim 3
Dependent Claim
22 words
An electrode as set forth in claim 1, wherein the electric resistance of the electroconductive hydrogel is not more than 1 mega-Ω·cm.
Claim 4
Dependent Claim
22 words
An electrode as set forth in claim 1, wherein the electric resistance of the electroconductive hydrogel is not more than 1 kilo-Ω·cm.
Claim 5
Dependent Claim
27 words
An electrode as set forth in claim 1, wherein the water content of the electroconductive hydrogel is in the range of from 30 to 95% by weight.
Claim 6
Dependent Claim
82 words
An electrode as set forth in claim 1, wherein the hydrogel is composed of a mixture of poly-N--vinylpyrrolidone with a polymer of an alkyl methacrylate having 1 to 4 carbon atoms in the alkyl group, a polymer of an alkyl acrylate having 1 to 4 carbon atoms in the alkyl group or a copolymer of an alkyl methacrylate having 1 to 4 carbon atoms in the alkyl group with an alkyl acrylate having 1 to 4 carbon atoms in the alkyl group.
Claim 7
Dependent Claim
56 words
An electrode as set forth in claim 1, wherein the hydrogel is composed of a copolymer of N-vinylpyrrolidone with at least one monomer selected from the group consisting of an alkyl methacrylate having 1 to 4 carbon atoms in the alkyl group and an alkyl acrylate having 1 to 4 carbon atoms in the alkyl group.
Claim 8
Dependent Claim
23 words
An electrode as set forth in claim 1, wherein the lead line is made of carbon fiber, platinum, gold, silver or stainless steel.
Claim 9
Dependent Claim
34 words
An electrode as set forth in claim 1, wherein said electrode is prepared by casting or molding a hydrogel-forming material into a lens-shaped material, integrally with a lead line between convex and concave molds.
Claim 10
Dependent Claim
15 words
An electrode as set forth in claim 1, wherein the concave mold has a groove.
Claim 11
Dependent Claim
31 words
A method of preparing an electrode of claim 1, which comprises casting or molding a hydrogel-forming material into a lens-shaped material, integrally with a lead line between convex and concave molds.
Claim 12
Dependent Claim
15 words
A method as set forth in claim 8, wherein the concave mold has a groove.
References Cited (Backward Citations)
No citation records indexed.
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