Patent US4894253A successfully refreshed from Google Patents.
US4894253A
Expired / Lapsed
US
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Method for production of coated electrode
Assignee: University of Cincinnati
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Filing: 1988-08-08
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Granted: 1990-01-16
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Expires: 2008-08-08
Abstract
Abstract An electrode having a coating comprising at least two layers, at least one layer being a polymer network cross-linked by high energy radiation or chemically, and a method of producing such an electrode. The electrode is useful as a sensor for molecular oxygen, or as an ampermometric sensor with an enzyme or antibody immobilized in the cross-linked polymer layer.
Inventors
- 👤 William R. Heineman
- 👤 James E. Mark
- 👤 Emory S. Decastro
- 👤 Christos Galiatsatos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:36
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/001; C12Q1/002; G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/327; G01N27/3271; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54366; G01N33/54373; G01N33/5438; H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
A method of producing an electrode which comprises applying to an electroconductive core a liquid inner layer and a liquid outer layer by dipping, spraying or spin coating at a temperature not higher than about 100° C., said inner and outer layers being different materials, at least said outer layer being polymerizable, cross-linking said outer polymerizable layer in situ into a network, and controlling the pore size of said layer to obtain a permeable polymer network.
Claim 2
Independent Claim
76 words
A method of producing an electrode which comprises applying to an electroconductive core a liquid inner layer and a liquid outer layer by dipping, spraying or spin coating at a temperature not higher than about 100° C., said inner and outer layers being different materials, at least said outer layer being polymerizable, cross-linking said outer polymerizable layer in situ into a network, and controlling the pore size of said layer to obtain a permeable polymer network.
Claim 3
Dependent Claim
14 words
The method claimed in claim 1, wherein cross-linking is effected by high energy radiation.
Claim 4
Dependent Claim
30 words
The method claimed in claim 1, wherein cross-linking is effected chemically by means of end linkers to obtain functionally terminated chains having a length not exceeding a Dp of 25.
Claim 5
Dependent Claim
21 words
The method claimed in claim 1, wherein cross-linking is effected chemically by means of reactive functional groups located as side chains.
Claim 6
Dependent Claim
23 words
The method claimed in claim 1, wherein cross-linking is effected chemically by generation of free radicals from unstable organic compounds by thermal decomposition.
Claim 7
Dependent Claim
13 words
The method claimed in claim 5, wherein said unstable organic compounds are peroxides.
Claim 8
Dependent Claim
29 words
The method claimed in claim 1, wherein said inner layer is polymerizable, wherein said inner layer is cross-linked by high energy radiation, and thereafter said outer layer is applied.
Claim 9
Dependent Claim
18 words
The method claimed in claim 5, wherein said outer layer is cross-linked after application by high energy radiation.
Claim 10
Dependent Claim
14 words
The method claimed in claim 8, wherein cross-linking is effected by gamma ray irradiation.
Claim 11
Dependent Claim
14 words
The method claimed in claim 7, wherein said outer layer is poly (dimethyl siloxane).
Claim 12
Dependent Claim
16 words
The method claimed in claim 7, wherein said inner layer is poly (vinylbenzyl trimethyl ammonium chloride).
Claim 13
Dependent Claim
16 words
The method claimed in claim 11, wherein a redox couple is dispersed in said inner layer.
Claim 14
Dependent Claim
24 words
The method claimed in claim 7, wherein said inner layer is poly (vinyl alcohol) having one of an enzyme and an antibody dispersed therein.
Claim 15
Dependent Claim
36 words
The method of claim 13, wherein said radiation is of a dose capable of completely cross-linking the polymer and entrapping the enzyme in the polymer network, but not capable of destroying the activity of the enzyme.
Claim 16
Dependent Claim
12 words
The method claimed in claim 13, wherein said enzyme is glucose oxidase.
Claim 17
Dependent Claim
23 words
The method claimed in claim 13, wherein said outer layer functions as a selective chemical film capable of retarding fouling of said electrode.
Claim 18
Dependent Claim
17 words
The method claimed in claim 1, wherein said outer layer is a gas permeable, liquid impermeable material.
Claim 19
Dependent Claim
16 words
The method claimed in claim 1, wherein said inner layer is poly (vinylbenzyl trimethyl ammonium chloride).
Claim 20
Dependent Claim
15 words
The method claimed in claim 1, wherein said outer layer is a poly (dimethyl siloxane).
References Cited (Backward Citations)
US4184001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |