Patent US4908113A successfully refreshed from Google Patents.
US4908113A
Expired / Lapsed
US
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Apparatus for the electrochemical separation of oxygen
Assignee: Gas Technology Institute
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Filing: 1989-06-12
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Granted: 1990-03-13
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Expires: 2009-06-12
Abstract
Abstract An electrochemical separation of oxygen from oxygen containing gaseous mixtures, such as air, using an oxygen containing molten inorganic salt electrolyte retained in a porous matrix between two gas porous catalytic electrodes wherein oxygen is separated from the gaseous mixture when electrical potential is applied across the electrodes providing movement of non-metallic oxygen containing ion from the cathode to the anode.
Inventors
- 👤 Leonard G. Marianowski
- 👤 Robert J. Remick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:20
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
An electrochemical oxygen concentration cell comprising: spaced porous electrodes each in contact with an electrolyte on one side and a gas chamber on the other side, said electrolyte comprising oxygen containing molten inorganic salt retained in a porous matrix between two said spaced porous electrodes.
Claim 2
Dependent Claim
45 words
An electrochemical oxygen concentration cell comprising: spaced porous electrodes each in contact with an electrolyte on one side and a gas chamber on the other side, said electrolyte comprising oxygen containing molten inorganic salt retained in a porous matrix between two said spaced porous electrodes.
Claim 3
Dependent Claim
28 words
An electrochemical oxygen concentration cell according to claim 1 wherein said electrolyte has an oxygen containing portion selected from the group consisting of nitrate, carbonate, sulfate, and phosphate.
Claim 4
Dependent Claim
29 words
An electrochemical oxygen concentration cell according to claim 2 wherein said electrolyte has an alkali metal portion selected from the group consisting of potassium, sodium, lithium, and mixtures thereof.
Claim 5
Dependent Claim
35 words
An electrochemical oxygen concentration cell according to claim 1 wherein said electrolyte is retained in a porous matrix selected from the group consisting of MgO, Al 2 O 3 , LiAlO 2 and mixtures thereof.
Claim 6
Dependent Claim
47 words
An electrochemical oxygen concentration cell according to claim 1 wherein said electrodes comprise a catalyst selected from elements of the Periodic Table appearing in a group selected from the group consisting of Groups IB, IIB, IIIA, VB, VIB, VIIB and VIII in metal oxide or cermet form.
Claim 7
Dependent Claim
31 words
An electrochemical oxygen concentration cell according to claim 1 wherein said electrodes comprise a catalyst selected from the group consisting of zinc, silver, nickel, aluminum, iron, copper, chromium and mixtures thereof.
Claim 8
Dependent Claim
17 words
An electrochemical oxygen concentration cell according to claim 1 wherein one of said electrodes comprises copper oxide.
References Cited (Backward Citations)
US517001A
Cited
US1120436A
Cited
US3410783A
Cited
US3888749A
Cited
US4061554A
Cited
US4132766A
Cited
US4340578A
Cited
US4089938A
Cited
US4300987A
Cited
US4287170A
Cited
EP0098157A1
Cited
US4475994A
Cited
US4526775A
Cited
US4529577A
Cited
US4565685A
Cited
US4738760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |