US4692273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel gel compositions, processes for making same and uses in transmitting and measuring electrical impulses
Assignee: HP Inc
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Filing: 1985-04-15
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Granted: 1987-09-08
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Expires: 2005-04-15
Abstract
Abstract This invention comprises improved novel aqueous gel compositions, and devices and methods for preparation of such compositions. The invention also includes the uses of these novel compositions and devices made therefrom as linkages for transmitting and measuring electrical phenomena, and particuarly for detecting and transmitting electrical impulses from mammalian skin to or through electrodes. Generally, the compositions of the invention contain critical and specific amounts of polyacrylamide, a titanium organic compound, specific and selected organic gums and at least one conductive salt.
Inventors
- 👤 Katherine Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/41; A61B5/411; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/263; A61B5/266; A61B5/279; A61B5/28; H; H01; H01B; H01B1/00; H01B1/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
An aqueous gel specially adapted for transmitting electrical impulses in connection with mammalian skin which comprises about 0.1% by weight of an organic titanate, about 1.5% up to about 10% by weight of at least one galactomannan gum, and a small but effective amount of from about 1% up to about 25% by weight of a conductive salt.
Claim 2
Dependent Claim
58 words
An aqueous gel specially adapted for transmitting electrical impulses in connection with mammalian skin which comprises about 0.1% by weight of an organic titanate, about 1.5% up to about 10% by weight of at least one galactomannan gum, and a small but effective amount of from about 1% up to about 25% by weight of a conductive salt.
Claim 3
Dependent Claim
20 words
A gel according to claim 1 which is specially adapted for transmitting electrical impulses from human skin to an electrode.
Claim 4
Dependent Claim
25 words
A gel according to claim 1 or 2 which additionally contains from about 0.1% up to about 25% by weight of at least one polyol.
Claim 5
Dependent Claim
26 words
A gel according to claims 1, or 2 which additionally contains from about 0.1% up to about 20% by weight of a low molecular weight alcohol.
Claim 6
Dependent Claim
14 words
A gel according to claim 1 in which the galactomannan gum is gum tragacanth.
Claim 7
Dependent Claim
14 words
A gel according to claim 1 in which the galactomannan gum is guar gum.
Claim 8
Dependent Claim
14 words
A gel according to claim 1 in which the galactomannan gum is xanthan gum.
Claim 9
Dependent Claim
21 words
A gel according to claims 1, or 2 which contains from about 0.1% up to about 25% by weight of glycerol.
Claim 10
Dependent Claim
21 words
A gel according to claims 1, or 2 which contains from about 0.1% up to about 25% by weight of sorbitol.
Claim 11
Dependent Claim
21 words
A gel according to claims 1, or 2 which contains from about 0.1% up to about 20% by weight of ethanol.
Claim 12
Dependent Claim
17 words
A gel according to claims 1, or 2 in which the organic titanate is titanium ammonium lactate.
References Cited (Backward Citations)
US4215696A
Cited
US4406827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |