Patent US4265727A successfully refreshed from Google Patents.
US4265727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite electrodes
Assignee: BP Chemicals Hitco Inc
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Filing: 1979-10-22
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Granted: 1981-05-05
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Expires: 1999-10-22
Abstract
Abstract Improved graphite composite electrodes are provided by rendering the matrix resin conductive by dispersing therein 5 to 15% by weight of a conductive pigment and by uniformly dispersing therein randomly oriented graphite fibers having a diameter below 30 microns and a length no more than 1/2 the thickness of the electrode plate. The electrodes are particularly useful in the disinfection of aqueous liquids with low power consumption and with very low ablation of the surface of the electrode.
Inventors
- 👤 Don A. Beckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:13
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/048; C02F2001/46133; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4616; C02F2303/00; C02F2303/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
An electrode comprising a shaped member having an electrode face and a rear face defining a thickness, said electrode comprising a composite of a uniform dispersion of randomly distributed graphite fibers having a diameter from 1 to 30 microns and a length of no more than 1/2 the thickness of the electrode member dispersed in a cured, oxidation-resistant and chemical resistant, continuous matrix resin containing a dispersion of conductive particles selected from graphite and carbon having a diameter smaller than the diameter of the fibers.
Claim 2
Dependent Claim
85 words
An electrode comprising a shaped member having an electrode face and a rear face defining a thickness, said electrode comprising a composite of a uniform dispersion of randomly distributed graphite fibers having a diameter from 1 to 30 microns and a length of no more than 1/2 the thickness of the electrode member dispersed in a cured, oxidation-resistant and chemical resistant, continuous matrix resin containing a dispersion of conductive particles selected from graphite and carbon having a diameter smaller than the diameter of the fibers.
Claim 3
Dependent Claim
19 words
An electrode according to claim 1 in which the particles have a diameter of from 0.1 to 1 micron.
Claim 4
Dependent Claim
13 words
An electrode according to claim 2 in which the particles are graphite flake.
Claim 5
Dependent Claim
19 words
An electrode according to claim 3 in which the graphite fiber has a diameter from 3 to 22 microns.
Claim 6
Dependent Claim
16 words
An electrode according to claim 4 in which the graphite fiber is a pitch based fiber.
Claim 7
Dependent Claim
19 words
An electrode according to claim 5 in which the matrix resin is an oxidation and chemical resistant thermosetting resin.
Claim 8
Dependent Claim
14 words
An electrode according to claim 6 in which the resin is an epoxy resin.
Claim 9
Dependent Claim
18 words
An electrode according to claim 7 in which the epoxy resin comprises an epoxidized aromatic alcohol-aldehyde prepolymer resin.
Claim 10
Dependent Claim
22 words
An electrode according to claim 8 in which the epoxy resin contains a cured mixture of epoxidized creosol-aldehyde and phenol-aldehyde prepolymer resins.
Claim 11
Dependent Claim
18 words
An electrode according to claim 1 further including a metal conductive element applied to the rear surface thereof.
Claim 12
Dependent Claim
15 words
An electrode according to claim 10 in which the element is a metal screen grid.
Claim 13
Dependent Claim
18 words
An electrode according to claim 11 in which the screen grid is adhesively secured to the rear face.
Claim 14
Dependent Claim
19 words
An electrode according to claim 10 in which the element is electrodeposited onto the rear face of the electrode.
Claim 15
Dependent Claim
19 words
An electrode according to claim 1 in which the member is in the shape is of a flat plate.
Claim 16
Dependent Claim
18 words
An electrode according to claim 1 in which the fibers have a length from 25 to 6250 microns.
Claim 17
Dependent Claim
146 words
An electrolytic cell comprising in combination: walls defining a housing having a compartment for receiving a body of electrolyte, an anode electrode within the housing having a front face in a communication with the compartment and having a rear face, a cathode electrode within the housing having a front face in a communication with the compartment and having a rear face, contact means for connection to the rear faces of said electrodes, and at least one of said electrodes comprising a composite of a uniform dispersion of randomly distributed graphite fibers having a diameter from 1 to 30 micron and a length no more than 1/2 the thickness of the electrode dispersed in a cured, oxidation and chemical resistant, continuous, matrix resin containing a dispersion of fine, particulate conductive filler having a diameter less than the diameter of the fibers and selected from carbon or graphite.
Claim 18
Dependent Claim
146 words
An electrolytic cell comprising in combination: walls defining a housing having a compartment for receiving a body of electrolyte, an anode electrode within the housing having a front face in a communication with the compartment and having a rear face, a cathode electrode within the housing having a front face in a communication with the compartment and having a rear face, contact means for connection to the rear faces of said electrodes, and at least one of said electrodes comprising a composite of a uniform dispersion of randomly distributed graphite fibers having a diameter from 1 to 30 micron and a length no more than 1/2 the thickness of the electrode dispersed in a cured, oxidation and chemical resistant, continuous, matrix resin containing a dispersion of fine, particulate conductive filler having a diameter less than the diameter of the fibers and selected from carbon or graphite.
Claim 19
Dependent Claim
25 words
A cell according to claim 16 in which the composite electrode includes a plurality of the flat shaped members connected in series in a stack.
Claim 20
Dependent Claim
64 words
A cell according to claim 17 in which the conductive filler is graphite or carbon having a diameter from 0.1 to 1 micron, and the graphite fiber is a pitch based fiber having a diameter from 3 to 22 microns and a length of no more than half the thickness of the plate and the plate has a thickness from 1/8 to 1/2 inch.
Claim 21
Dependent Claim
19 words
A cell according to claim 16 in which the matrix resin is an oxidation and chemically resistant epoxy resin.
Claim 22
Dependent Claim
22 words
A cell according to claim 19 in which the epoxy resin comprises a mixture of cured epoxidized creosolaldehyde and phenol aldehyde resins.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |