US2755236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst
Assignee: Sprague Electric Co
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Filing: 1953-06-15
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Granted: 1956-07-17
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Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:30
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS OF PRODUCING A NEW AND IMPROVED METALLIC CATALYST WHICH COMPRISES ADMIXING AT LEAST ONE DIVALENT METALLIC OXIDE SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE, COBALT OXIDE, AND IRON OXIDE WITH AT LEAST ONE ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM OXIDE, LITHIUM OXIDE, RUBIDIUM OXIDE, CESIUM OXIDE, AND POTASSIUM OXIDE, THE AMOUNTS OF ALKALI METAL AND DIVALENT OXIDES BEING SO CHOSEN THAT AT LEAST 25 MOL PERCENT OF EACH OXIDE IS PRESENT IN THE MIXTURE FORMING A COMPRESSED MASS FROM SAID MIXTURE, SINTERING SAID COMPRESSED MASS AT AN ELEVATED TEMPERATURE SO AS TO DIFFUSE THE ALKALI METAL IONS OF SAID MIXTURE INTO THE CRYSTALLINE STRUCTURE OF SAID DIVALENT OXIDE, SLOWLY COOLING SAID COMPRESSED MASS, AND REDUCING THE SO-COOLED PRODUCT AS THE CATHODE IN AN ELECTROLYTIC BATH.
Claim 2
Dependent Claim
132 words
A PROCESS OF PRODUCING A NEW AND IMPROVED METALLIC CATALYST WHICH COMPRISES ADMIXING AT LEAST ONE DIVALENT METALLIC OXIDE SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE, COBALT OXIDE, AND IRON OXIDE WITH AT LEAST ONE ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM OXIDE, LITHIUM OXIDE, RUBIDIUM OXIDE, CESIUM OXIDE, AND POTASSIUM OXIDE, THE AMOUNTS OF ALKALI METAL AND DIVALENT OXIDES BEING SO CHOSEN THAT AT LEAST 25 MOL PERCENT OF EACH OXIDE IS PRESENT IN THE MIXTURE FORMING A COMPRESSED MASS FROM SAID MIXTURE, SINTERING SAID COMPRESSED MASS AT AN ELEVATED TEMPERATURE SO AS TO DIFFUSE THE ALKALI METAL IONS OF SAID MIXTURE INTO THE CRYSTALLINE STRUCTURE OF SAID DIVALENT OXIDE, SLOWLY COOLING SAID COMPRESSED MASS, AND REDUCING THE SO-COOLED PRODUCT AS THE CATHODE IN AN ELECTROLYTIC BATH.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |