US3344582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irreversible hydrogen membrane
Assignee: Kovalus Separation Solutions LLC
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Filing: 1964-12-21
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Granted: 1967-10-03
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert P Merrill
- 👤 Richard P Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:01
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A METHOD FOR SEPARATING HYDROGEN BY DIFFUSION FROM GASEOUS MIXTURES AND FOR PREVENTING THE BACK DIFFUSION OF THE SEPARATED HYDROGEN MIXTURE WHICH METHOD COMPRISES: PROVIDING A DIFFUSION CELL HAVING A SEMI-PERMEABLE MEMBRANE COMPRISING A FIRST LAYER OF A METAL WHICH CATALYZES THE DISSOCIATION OF THE HYDROGEN MOLECULE INTO HYDROGEN ATOMS AND PERMITS THE PASSAGE OF THE HYDROGEN ATOMS THERETHROUGH AND A SECOND LAYER OF A MATERIAL WHICH HAS A HIGH SOLUBILITY FOR THE HYDROGEN ATOMS SO DIFFUSED THROUGH THE FIRST LAYER, BUT WHICH IS SUBSTANTIALLY IMPERVIOUS AND INSOLUBLE TO THE PASSAGE OF HYDROGEN MOLECULES; HEATING THE FIRST LAYER TO AN ELEVATED TEMPERATURE SUFFICIENT TO PROVIDE FOR THE RAPID DISSOCIATION OF THE HYDROGEN MOLECULE; CONTACTING THE FIRST LAYER WITH A HYDROGEN-CONTAINING GAS STREAM AT AN ELEVATED PRESSURE WHICH STREAM IS SUBJECT TO VARIATIONS IN THE PARTIAL PRESSURE OF THE HYDROGEN THEREIN; WITHDRAWING DIFFUSED HYDROGEN AT A REDUCED PRESSURE FROM THE DOWN STREAM SIDE OF THE SECOND LAYER; AND WITHDRAWING THE NON-DIFFUSED COMPONENT FROM THE UPSTREAM SIDE OF THE FIRST LAYER WHEREBY THE LAYER PREVENTS BACK DIFFUSION OF THE HYDROGEN MOLECULE WHEN THE HYDROGEN PRESSURE OF THE GAS STREAM FALLS BELOW THE PRESURE OF THE HYDROGEN ON THE DOWNSTREAM SIDE OF THE SECOND LAYER.
Claim 2
Independent Claim
202 words
A METHOD FOR SEPARATING HYDROGEN BY DIFFUSION FROM GASEOUS MIXTURES AND FOR PREVENTING THE BACK DIFFUSION OF THE SEPARATED HYDROGEN MIXTURE WHICH METHOD COMPRISES: PROVIDING A DIFFUSION CELL HAVING A SEMI-PERMEABLE MEMBRANE COMPRISING A FIRST LAYER OF A METAL WHICH CATALYZES THE DISSOCIATION OF THE HYDROGEN MOLECULE INTO HYDROGEN ATOMS AND PERMITS THE PASSAGE OF THE HYDROGEN ATOMS THERETHROUGH AND A SECOND LAYER OF A MATERIAL WHICH HAS A HIGH SOLUBILITY FOR THE HYDROGEN ATOMS SO DIFFUSED THROUGH THE FIRST LAYER, BUT WHICH IS SUBSTANTIALLY IMPERVIOUS AND INSOLUBLE TO THE PASSAGE OF HYDROGEN MOLECULES; HEATING THE FIRST LAYER TO AN ELEVATED TEMPERATURE SUFFICIENT TO PROVIDE FOR THE RAPID DISSOCIATION OF THE HYDROGEN MOLECULE; CONTACTING THE FIRST LAYER WITH A HYDROGEN-CONTAINING GAS STREAM AT AN ELEVATED PRESSURE WHICH STREAM IS SUBJECT TO VARIATIONS IN THE PARTIAL PRESSURE OF THE HYDROGEN THEREIN; WITHDRAWING DIFFUSED HYDROGEN AT A REDUCED PRESSURE FROM THE DOWN STREAM SIDE OF THE SECOND LAYER; AND WITHDRAWING THE NON-DIFFUSED COMPONENT FROM THE UPSTREAM SIDE OF THE FIRST LAYER WHEREBY THE LAYER PREVENTS BACK DIFFUSION OF THE HYDROGEN MOLECULE WHEN THE HYDROGEN PRESSURE OF THE GAS STREAM FALLS BELOW THE PRESURE OF THE HYDROGEN ON THE DOWNSTREAM SIDE OF THE SECOND LAYER.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |