Patent DE335788C successfully refreshed from Google Patents.
US3989050A
Expired / Lapsed
US
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Process for utilizing certain gel compositions for electrical stimulation
Assignee: Individual
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Filing: 1972-09-19
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Granted: 1976-11-02
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Expires: 1992-09-19
Abstract
Abstract A process for utilizing gel compositions containing thickening agents which are primarily long chain organic powders in combination with small amounts of auxiliary polar thickeners having no metallic cations are described. They are particularly suitable for use as electrode gels in applications where long term contact of the electrodes with the skin is necessary. The process utilizing the described gel compositions, unlike the gels known to the art will not irritate the skin, corrode the electrodes, dry out in only a few hours or leak out from the electrode.
Inventors
- 👤 Gilbert Buchalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/0404; A61N1/0472; A61N1/0492; A61N1/0496; A61N1/0408; A61N1/0452; A61N1/0456; A61N1/046
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
The process of electrical stimulation which comprises the steps of: a. applying a perspiration-resistant gel composition comprising a major proportion of water from 1/20th of 1 wt. % to 10 wt. % of a long chain water soluble ionic polymeric thickener having a Brookfield viscosity (CPS) of approximately 1,000 to 100,000 at a 1 wt. % concentration in H 2 O, which has been neutralized with an alkali metal hydroxide, from 1/1,000 of 1 wt. % to 3 wt. % of a cellulosic backbone auxiliary thickener having no metallic ion constituent which has at least one primary hydroxy group attached to each repeating unit in the cellulose backbone having a 1 wt. % solution viscosity (Brookfield) at 25° C. of from 100 to 10,000 and from 10.5 to 25 wt. % of a polyol humectant wherein said gel has a pH of between 3.5 to 11.5, to the surface of an animal, including humans, b. firmly contacting the resulting gel area with at least one metal electrode, c. applying a galvanic force between said electrode and said surface.
Claim 2
Dependent Claim
178 words
The process of electrical stimulation which comprises the steps of: a. applying a perspiration-resistant gel composition comprising a major proportion of water from 1/20th of 1 wt. % to 10 wt. % of a long chain water soluble ionic polymeric thickener having a Brookfield viscosity (CPS) of approximately 1,000 to 100,000 at a 1 wt. % concentration in H 2 O, which has been neutralized with an alkali metal hydroxide, from 1/1,000 of 1 wt. % to 3 wt. % of a cellulosic backbone auxiliary thickener having no metallic ion constituent which has at least one primary hydroxy group attached to each repeating unit in the cellulose backbone having a 1 wt. % solution viscosity (Brookfield) at 25° C. of from 100 to 10,000 and from 10.5 to 25 wt. % of a polyol humectant wherein said gel has a pH of between 3.5 to 11.5, to the surface of an animal, including humans, b. firmly contacting the resulting gel area with at least one metal electrode, c. applying a galvanic force between said electrode and said surface.
Claim 3
Dependent Claim
73 words
The process of claim 1 wherein said gel composition contains sodium hydroxide or potassium hydroxide, said polymeric thickener is chosen from the group consisting of Ganatrez, sodium alginate, gum tragacanth, locust bean gum, polyethylene oxide, sodium carboxymethyl cellulose, guar gum, methyl cellulose, Carbopol and mixtures thereof, said auxiliary thickener is a hydroxy alkylene cellulose polymer, and said humectant is a polyalkylene glycol wherein said alkylene groups comprise from 2 to 10 carbon atoms.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein said gel contains as said polymeric thickener, Carbopol; and as said auxiliary thickener, hydroxy ethyl cellulose; and as said humectant, propylene glycol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |