Patent US4149957A successfully refreshed from Google Patents.
US4149957A
Expired / Lapsed
US
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Separation apparatus
Assignee: Ricardo AEA Ltd
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Filing: 1978-07-31
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Granted: 1979-04-17
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Expires: 1998-07-31
Abstract
Abstract An electrophoretic separation apparatus of the type described in U.S. Pat. No. 3,844,926 wherein the means for generating the electric field is constituted by an anode system and a cathode system, said systems being positioned on opposite sides of the annular separation chamber to one another and one or both of said systems comprising a semi-permeable membrane which defines the annular separation chamber, at least in part, and which is supported by a water-permeable resin-bonded cellulose fibre material, means for contacting said material with an electrolyte, and an electrode for supplying an electric current to the electrolyte.
Inventors
- 👤 John A. Gibson
- 👤 Michael J. Smyth
- 👤 Derek J. Steptoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:42
CPC Classifications
B; B01; B01D; B01D57/00; B01D57/02; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
An electrophoretic separation apparatus of the kind described wherein the means for generating the electric field is constituted by anode system and a cathode system, said systems being positioned on opposite sides of the annular separation chamber to one another and one or both of said systems comprising a semi-permeable membrane which defines the annular separation chamber, at least in part, and which is supported by a water-permeable resin-bonded cellulose fibre material, means for contacting said material with an electrolyte, and an electrode for supplying an electric current to the electrolyte.
Claim 2
Dependent Claim
91 words
An electrophoretic separation apparatus of the kind described wherein the means for generating the electric field is constituted by anode system and a cathode system, said systems being positioned on opposite sides of the annular separation chamber to one another and one or both of said systems comprising a semi-permeable membrane which defines the annular separation chamber, at least in part, and which is supported by a water-permeable resin-bonded cellulose fibre material, means for contacting said material with an electrolyte, and an electrode for supplying an electric current to the electrolyte.
Claim 3
Dependent Claim
57 words
An electrophoretic separation apparatus according to claim 1 wherein each of said systems comprises a semi-permeable membrane which defines the annular separation chamber, at least in part, and which is supported by a water-permeable resin-bonded cellulose fibre material, means for contacting said material with an electrolyte, and an electrode for supplying a electric current to the electrolyte.
Claim 4
Dependent Claim
19 words
An electrophoretic separation apparatus according to claim 2 wherein the material is a phenolic resin bonded cellulose fibre material.
Claim 5
Dependent Claim
24 words
An electrophoretic separation apparatus according to claim 3 wherein the material has a pore size of 5 microns and a void fraction of 85%.
Claim 6
Dependent Claim
29 words
An electrophoretic separation apparatus according to claim 3 wherein the cathode system is housed in the central cylinder of the apparatus and the anode system in the outer cylinder.
References Cited (Backward Citations)
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |