US4273135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biomedical electrode
Assignee: 3M Co
•
Filing: 1978-09-08
•
Granted: 1981-06-16
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Expires: 1998-09-08
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 consists essentially of a cohesive, conformable, nonionic hydrophilic synthetic polymer.
Inventors
- 👤 Franklin C. Larimore
- 👤 Steven M. Heilmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:46
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/41; A61B5/411; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/259; C; C09; C09J; C09J133/00; C09J133/04; C09J133/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 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 consists essentially of a dermally nonirritating, conformable, cohesive, non-ionic synthetic hydrophilic polymer containing at least 15 mole percent of a water-soluble monomer, said electrode having an impedance of 500 Kohms or less at a frequency of 10 Hertz.
Claim 2
Dependent Claim
98 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 consists essentially of a dermally nonirritating, conformable, cohesive, non-ionic synthetic hydrophilic polymer containing at least 15 mole percent of a water-soluble monomer, said electrode having an impedance of 500 Kohms or less at a frequency of 10 Hertz.
Claim 3
Dependent Claim
57 words
The electrode according to claim 1 wherein said polymer is selected from the group consisting of: (A) water-soluble non-ionic polymers of substantially all water soluble monomers; (B) non-ionic water-soluble interpolymers of water-soluble monomers and water-insoluble monomers; and (C) non-ionic water-insoluble interpolymers of water-soluble monomers and water-insoluble monomers that contain at least 15 mole percent of water-soluble monomers.
Claim 4
Dependent Claim
11 words
The electrode according to claim 2 wherein said polymer is plasticized.
Claim 5
Dependent Claim
13 words
The electrode according to claim 3 wherein said polymer is plasticized with glycerol.
Claim 6
Dependent Claim
18 words
The electrode according to claim 2 wherein said polymer is a water-soluble polymer of substantially all water-soluble monomers.
Claim 7
Dependent Claim
21 words
The electrode according to claim 5 wherein said polymer is selected from the group consisting of polyacrylic acid and polyvinyl alcohol.
Claim 8
Dependent Claim
15 words
The electrode according to claim 6 wherein said acrylic acid polymer is plasticized with glycerol.
Claim 9
Dependent Claim
29 words
The electrode according to claim 2 wherein said polymer is a water-insoluble interpolymer of water-soluble monomers and water-insoluble monomers that contain at least 15 mole percent of water-soluble monomers.
Claim 10
Dependent Claim
20 words
The electrode according to claim 8 wherein said water-insoluble monomers contain alkyl groups containing about 4 to 12 carbon atoms.
Claim 11
Dependent Claim
26 words
The electrode according to claim 9 wherein said water insoluble monomers 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 water insoluble monomers are selected from the group consisting of -butyl acrylate, 2-ethyl hexyl methacrylate, -octyl acrylate, butyl acrylate and lauryl methacrylate.
Claim 13
Dependent Claim
23 words
The electrode according to claim 8 wherein said water soluble monomers are selected from the group consisting of acrylic acid and methacrylic acid.
Claim 14
Dependent Claim
14 words
The electrode according to claim 12 wherein said water insoluble monomer is iso-octyl acrylate.
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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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |