Patent US1519705A successfully refreshed from Google Patents.
US4299231A
Expired / Lapsed
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Electrically conductive, visco-elastic gel and its use in electrode
Assignee: ARBO Medizin-Technologie GmbH
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Filing: 1979-11-13
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Granted: 1981-11-10
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Expires: 1999-11-13
Abstract
Abstract A visco-elastic gel comprising a high molecular weight polysaccharide, at least one polyol and, optionally, at least one non-volatile acid soluble in the polyol and at least one non-volatile base soluble in the polyol. The polyol has a water content of 5 to 20 percent by weight and the various components set forth are physiologically acceptable. The gel is particularly suitable as a means for releasably securing an electrode to the skin as, for example, when taking an EEG or EKG. Methods of making a suitable electrode and using it are also disclosed.
Inventors
- 👤 Werner Karmann
- 👤 Gerd Weidehaas
- 👤 Bernd Howe
- 👤 Frank Piel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/259; C; C08; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28; C08L1/286; C08L5/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; H01M; H01M6/00; H01M6/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A visco-elastic gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 0 to 30% of at least one non volatile acid soluble in said polyol, 0 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable, said gel having a pH of about 4 to 5.
Claim 2
Dependent Claim
112 words
A visco-elastic gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 0 to 30% of at least one non volatile acid soluble in said polyol, 0 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable, said gel having a pH of about 4 to 5.
Claim 3
Dependent Claim
102 words
A visco-elastic gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 5 to 30% of at least one non volatile acid soluble in said polyol, 5 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable.
Claim 4
Dependent Claim
102 words
A visco-elastic gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 5 to 30% of at least one non volatile acid soluble in said polyol, 5 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable.
Claim 5
Dependent Claim
116 words
An electrode comprising a contact and a visco-elastic gel for electrical connection with the skin, said gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 0 to 30% of at least one non volatile acid soluble in said polyol, 0 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable.
Claim 6
Dependent Claim
116 words
An electrode comprising a contact and a visco-elastic gel for electrical connection with the skin, said gel comprising as components 10 to 50% of a high molecular weight gum karaya, 90 to 20% of at least one polyol taken from the class consisting of ethylene glycol, propylene glycol, glycerine, and homologous C 4 alcohols, 0 to 30% of at least one non volatile acid soluble in said polyol, 0 to 30% of at least one non volatile base soluble in said polyol, all percentages being by weight and based on total weight of said gel, said polyol having a water content of 5 to 50% by weight based on said polyol, said components being physiologically acceptable.
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |