Patent US3625589A successfully refreshed from Google Patents.
US3665064A
Expired / Lapsed
US
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Method of making a perspiration resistant biopotential electrode
Assignee: National Aeronautics and Space Administration
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Filing: 1969-05-09
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Granted: 1972-05-23
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Expires: 1989-05-09
Abstract
Abstract To a conventional biopotential electrode mixture is added 5-15 percent of a colloidal material which acts as a screen for undesirable ions resulting from perspiration. This colloidal ion screening material is selected from a group consisting of various gums, bentonite clay, and a magnesium aluminum silicate clay-like material. The mixture is pressed into shape around an electrode wire after being subjected to a partial vacuum.
Inventors
- 👤 Benjamin Mosier
- 👤 Joe L Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:03
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/263; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215; A61B2562/12; A61B2562/125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
The method of claim 1 wherein the small particles are at least 200 mesh; the atmospheric pressure is reduced to approximately 1 to 5 milimeters of mercury; and a pressure in the approximate range of 8,000 to 50,000 pounds per square inch is applied to the small particles for approximately 1 to 3 minutes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |