Patent US2863838A successfully refreshed from Google Patents.
US2863838A
Expired / Lapsed
US
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Production of catalysts containing vanadium
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-08-08
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Granted: 1958-12-09
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Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Vincent George Clarkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:21
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR THE PRODUCTION OF A SKELETAL GLASS CATALYST CONTAINING AS AN ESSENTIAL CONSTITUENT VANADIUM WHICH COMPRISES THE STEPS OF FUSING A MIXTURE CONTAINING UP TO 10% VANADIUM AS VANADIUM PENTOXIDE, 30 TO 60% SILICA, 10 TO 50% BORIC OXIDE AND ALKALI METAL EQUIVALENT TO AN ALKALI METAL OXIDE ME2O/VANADIUM PENTOXIDE RATIO OF 1.5:1 TO 3:1 TO PRODUCE A GLASS, SUBJECTING THE GLASS TO A TEMPERATURE WITHIN THE RANGE 400 TO 700*C. TO CAUSE SEPARATION OF PHASES AT LEAST ONE OF WHICH IS SOLUBLE IN AN EXTRACTION MEDIUM SELECTED FROM THE GROUP CONSISTING OF CAUSTIC ALKALIES AND MINERAL ACIDS AND EXTRACTING AT LEAST PART OF AT LEAST ONE SOLUBLE PHASE.
Claim 2
Dependent Claim
111 words
A PROCESS FOR THE PRODUCTION OF A SKELETAL GLASS CATALYST CONTAINING AS AN ESSENTIAL CONSTITUENT VANADIUM WHICH COMPRISES THE STEPS OF FUSING A MIXTURE CONTAINING UP TO 10% VANADIUM AS VANADIUM PENTOXIDE, 30 TO 60% SILICA, 10 TO 50% BORIC OXIDE AND ALKALI METAL EQUIVALENT TO AN ALKALI METAL OXIDE ME2O/VANADIUM PENTOXIDE RATIO OF 1.5:1 TO 3:1 TO PRODUCE A GLASS, SUBJECTING THE GLASS TO A TEMPERATURE WITHIN THE RANGE 400 TO 700*C. TO CAUSE SEPARATION OF PHASES AT LEAST ONE OF WHICH IS SOLUBLE IN AN EXTRACTION MEDIUM SELECTED FROM THE GROUP CONSISTING OF CAUSTIC ALKALIES AND MINERAL ACIDS AND EXTRACTING AT LEAST PART OF AT LEAST ONE SOLUBLE PHASE.
References Cited (Backward Citations)
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US2504001A
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US2515943A
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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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |