US4483694A
Expired / Lapsed
US
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Oxygen gas permselective membrane
Assignee: Toshiba Corp
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Filing: 1983-03-14
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Granted: 1984-11-20
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Expires: 2003-03-14
Abstract
Abstract There is disclosed an oxygen gas permselective membrane comprising a film of a water-containable or wettable metallic oxide. The oxygen gas permselective membrane according to this invention, though being very thin, does not allow water vapor and carbon dioxide gas in air to permeate therethrough and has a great function for allowing oxygen gas to selectively permeate therethrough.
Inventors
- 👤 Tsutomu Takamura
- 👤 Atsuo Imai
- 👤 Nobukazu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0039; B01D67/0072; B01D67/0069; B01D71/00; B01D71/02; B01D71/024; G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/40; H; H01; H01M; H01M4/00; H01M4/86; B01D2325/00; B01D2325/04; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
48 words
An oxygen gas permselective membrance which comprises a film consisting essentially of a water-containable or wettable metallic oxide which comprises at least one selected from the group consisting of stannic oxide, zinc oxide, aluminum oxide, magnesium oxide, calcium oxide, strontium oxide, barium oxide, titanium dioxide, and silicon dioxide.
Claim 2
Dependent Claim
48 words
An oxygen gas permselective membrance which comprises a film consisting essentially of a water-containable or wettable metallic oxide which comprises at least one selected from the group consisting of stannic oxide, zinc oxide, aluminum oxide, magnesium oxide, calcium oxide, strontium oxide, barium oxide, titanium dioxide, and silicon dioxide.
Claim 3
Dependent Claim
22 words
An oxygen gas permselective membrane according to claim 1, wherein said film has a thickness of about 0.01 to about 1.0 μm.
Claim 4
Dependent Claim
30 words
An oxygen gas permselective membrane according to claim 1, wherein said film is deposited integrally on either surface of a porous membrane of 0.1 μm or less in pore size.
Claim 5
Dependent Claim
22 words
An oxygen gas permselective membrane according to claim 3, wherein said film has a thickness of about 0.01 to about 1.0 μm.
Claim 6
Dependent Claim
26 words
An oxygen gas permselective membrane according to claim 3, wherein a water repellent layer is interposed integrally and laminatedly between said film and said porous membrane.
Claim 7
Dependent Claim
28 words
An oxygen gas permselective membrane according to claim 5, wherein said water repellent layer comprises a thin layer obtained by plasma polymerization of a monomolecular fluorinated organic compound.
Claim 8
Dependent Claim
35 words
An oxygen gas permselective membrane according to claim 5, wherein said water repellent layer and said film of the metallic oxide each have a thickness within the range of about 0.01 to about 1.0 μm.
Claim 9
Dependent Claim
54 words
An oxygen gas permselective membrane according to claim 1, further comprising a porous electrode body defining a gas-side surface to which one of the group consisting of said film and said porous membrane is applied, said porous electrode body having an electrochemical reducing function relative to oxygen gas and simultaneously a current collecting function.
Claim 10
Dependent Claim
32 words
An oxygen gas permselective membrane according to claim 8, wherein said metallic oxide is deposited on the gas-side surface of the electrode body by means of a deposition process or sputtering process.
Claim 11
Dependent Claim
66 words
An oxygen gas permselective membrane according to claim 8, which is prepared by a process comprising the steps of (i) depositing said film consisting essentially of said metallic oxide on a surface of a porous membrane having pores in the size range of about 0.1 μm or less; and thereafter (ii) integrally and compressedly bonding said porous membrane to said gas-side surface of said electrode body.
Claim 12
Dependent Claim
26 words
An oxygen gas permselective membrane according to claim 10, wherein a water repellent layer is interposed integrally and laminatedly between said film and said porous membrane.
Claim 13
Dependent Claim
28 words
An oxygen gas permselective membrane according to claim 11, wherein said water repellent layer comprises a thin layer obtained by plasma polymerization of a monomolecular fluorinated organic compound.
Claim 14
Dependent Claim
35 words
An oxygen gas permselective membrane according to claim 11, wherein said water repellent layer and said film of the metallic oxide each have a thickness within the range of about 0.01 to about 1.0 μm.
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |