US2776871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quality of vanadium trioxide for the manufacture of ductile vanadium
Assignee: Westinghouse Electric Corp
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Filing: 1953-07-08
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Granted: 1957-01-08
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Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John C R Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:12
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
THE METHOD OF REMOVING NITROGEN FROM A VANADIUM OXIDE, SELECTED FROM THE GROUP CONSISTING OF VANADOUS AND HYPO-VANADOUS OXIDES, AND HIGH IN NITROGEN CONTENT, COMPRISING PLACING THE VANADIUM OXIDE IN A REACTION CHAMBER MAINTAINED AT A TEMPERATURE BETWEEN A MAXIMUM OF 650*C. AND 350*C., WHILE SUBJECTING SAID OXIDE TO THE REACTION OF WATER VAPOR AT A DEW POINT BETWEEN 0*C. AN 60*C. IN A CARRYING CURRENT OF HYDROGEN TO WHICH SAID OXIDE IS SUBSTANTIALLY INERT.
References Cited (Backward Citations)
US866421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |