US3939006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen absorbing material for electrochemical cells
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1972-07-03
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Granted: 1976-02-17
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Expires: 1992-07-03
Abstract
Abstract Buildup of unreacted hydrogen gas in sealed electrochemical cells has been prevented by inserting a hydrogen absorbing device into the cell before sealing. This hydrogen absorbing device is preferably a discrete shaped body, e.g., cylindrical or ring shaped, encased in an electrolyte impermeable, but hydrogen gas permeable membrane and includes a material which will react chemically with hydrogen gas, a catalyst for the hydrogen consuming reaction, and a compatible binder which maintains the reactant and catalyst in the form of a discrete shaped body which is porous to hydrogen gas.
Inventors
- 👤 Akiya Kozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/52; B; B01; B01D; B01D53/00; B01D53/02; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A hydrogen gas absorbing pellet consisting essentially of a solid compound which will react chemically with hydrogen gas, a catalyst for the hydrogen gas consuming reaction, a binder for retaining the solid compound and the catalyst in a desired geometric shaped body which will be porous to hydrogen gas so as to allow the gas to circulate through the body and contact the surface of the solid compound and catalyst, and an outer sheath encasing said body which is permeable to hydrogen gas but impermeable to liquid.
Claim 2
Dependent Claim
87 words
A hydrogen gas absorbing pellet consisting essentially of a solid compound which will react chemically with hydrogen gas, a catalyst for the hydrogen gas consuming reaction, a binder for retaining the solid compound and the catalyst in a desired geometric shaped body which will be porous to hydrogen gas so as to allow the gas to circulate through the body and contact the surface of the solid compound and catalyst, and an outer sheath encasing said body which is permeable to hydrogen gas but impermeable to liquid.
Claim 3
Dependent Claim
16 words
The hydrogen gas absorbing pellet of claim 1 wherein said solid compound is a metal oxide.
Claim 4
Dependent Claim
15 words
The hydrogen gas absorbing pellet of claim 1 wherein said catalyst is a noble metal.
Claim 5
Dependent Claim
15 words
The hydrogen gas absorbing pellet of claim 1 wherein said binder is an inorganic cement.
Claim 6
Dependent Claim
58 words
The hydrogen gas absorbing pellet of claim 1 wherein said solid compound is powdered electrolytic manganese dioxide, said catalyst is palladium-catalyzed carbon, said binder is a mixture of Portland cement, acetylene black and steelwool fibers, said solid compound and catalyst are intimately admixed and dispersed through said binder, and said outer sheath is a sheet of polyethylene film.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |