Patent US4352359A successfully refreshed from Google Patents.
US4352359A
Expired / Lapsed
US
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Biomedical electrode
Assignee: 3M Co
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Filing: 1980-06-02
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Granted: 1982-10-05
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Expires: 2000-06-02
Abstract
Abstract An essentially dry, disposable biomedical electrode is disclosed having an improved electrically-conductive material at the interface between the electrode and the skin. The conductive material comprises a dermally-nonirritating cohesive, conformable, synthetic hydrophilic polymer containing at least 5 mole percent of monomer units containing a salt of a carboxylic acid.
Inventors
- 👤 Franklin C. Larimore
- 👤 Steven M. Heilmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/41; A61B5/411; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/259; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/0404; A61N1/0472; A61N1/0492; A61N1/0496; A61N1/048
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
In an essentially dry disposable biomedical electrode comprising an electrode plate having an upper surface and a lower body-contacting surface, said upper surface having means for electrically connecting said electrode plate to a lead wire, and a conductive material on said body-contacting surface of said electrode plate for enhancing electrical connection with the skin, the improvement wherein said conductive material comprises a dermally-nonirritating, conformable, cohesive, synthetic hydrophilic polymer containing at least 5 mole percent of monomer units containing a salt of a carboxylic acid, said electrode having an impedance of 500 Kohms or less at a frequency of 10 Hertz.
Claim 2
Dependent Claim
100 words
In an essentially dry disposable biomedical electrode comprising an electrode plate having an upper surface and a lower body-contacting surface, said upper surface having means for electrically connecting said electrode plate to a lead wire, and a conductive material on said body-contacting surface of said electrode plate for enhancing electrical connection with the skin, the improvement wherein said conductive material comprises a dermally-nonirritating, conformable, cohesive, synthetic hydrophilic polymer containing at least 5 mole percent of monomer units containing a salt of a carboxylic acid, said electrode having an impedance of 500 Kohms or less at a frequency of 10 Hertz.
Claim 3
Dependent Claim
11 words
The electrode according to claim 1 wherein said polymer is water-soluble.
Claim 4
Dependent Claim
25 words
The electrode according to claim 2 wherein said polymer contains at least about 25 mole percent monomer units containing a salt of a carboxylic acid.
Claim 5
Dependent Claim
28 words
The electrode according to claim 1 wherein said salt is selected from the group consisting of Group I metal, amine, and quaternary ammonium salts of a carboxylic acid.
Claim 6
Dependent Claim
13 words
The electrode according to claim 4 wherein said salt is an amine salt.
Claim 7
Dependent Claim
21 words
The electrode according to claim 5 wherein said amine salt is an alkanolamine salt having 2 to 12 carbon atoms inclusive.
Claim 8
Dependent Claim
21 words
The electrode according to claim 6 wherein said alkanolamine is selected from the group consisting of ethanolamine, methyldiethanolamine, diethanolamine and triethanolamine.
Claim 9
Dependent Claim
24 words
The electrode according to claim 1 wherein said carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid, and maleic acid.
Claim 10
Dependent Claim
36 words
The electrode according to claim 1 wherein said polymer is a copolymer further comprising monomer units free of carboxylic acid groups and carboxylic acid salts and containing alkyl groups having about 4 to 12 carbon atoms.
Claim 11
Dependent Claim
25 words
The electrode according to claim 9 wherein said monomer units are selected from the group consisting of alkyl acrylates, alkyl methacrylates, and alkyl vinyl ethers.
Claim 12
Dependent Claim
30 words
The electrode according to claim 10 wherein said monomer units are selected from the group consisting of iso-octyl acrylate, butyl acrylate, 2-ethylhexyl methacrylate, methyl vinyl ether, and 2-ethylhexyl vinyl ether.
Claim 13
Dependent Claim
37 words
The electrode according to claim 11 wherein said carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid and maleic acid and said salt is an alkanolamine salt having 2 to 12 carbon atoms.
Claim 14
Dependent Claim
13 words
The electrode according to claim 1 wherein said polymer is copoly(n-butyl acrylate:acrylic acid).methyldiethanolamine.
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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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |