Patent US3650680A successfully refreshed from Google Patents.
US3650680A
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Processes for obtaining vanadium suboxides
Assignee: Teeg Research Inc
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Filing: 1965-04-12
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Granted: 1972-03-21
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Expires: 1985-04-12
Abstract
Abstract Methods for obtaining vanadium suboxide of the general formula VOx, wherein x is comprised between 1.5 and 2.02, consisting in heating vanadium pentoxide, contained in an inert boat, in a reduced atmosphere in the presence of a stoichiometric amount of vanadium pentoxide or, alternately, in continuously evacuating the atmosphere of the vessel in which the boat is placed, and recovering the vanadium suboxide in a bulk or crystalline form remaining in the boat.
Inventors
- 👤 Robert O Teeg
- 👤 Robert W Hallman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:03
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/083; C23C14/22; C23C14/24; C23C14/58; C23C14/5806; C23C14/5846; C23C14/5853; C30; C30B; C30B23/00; C30B23/007; C30B29/00; C30B29/10; C30B29/16; C01P; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
Process for the preparation of vanadium suboxide of the formula VOx wherein x is comprised between 1.5 and 2.02 which comprises evaporating vanadium pentoxide in an inert boat in a bell jar at a temperature in the range of 650* to 700* C. under a pressure of substantially 10 5 mm. Hg, simultaneously evacuating the bell jar for eliminating the evaporated vanadium pentoxide until all vanadium pentoxide is evaporated leaving a crystalline residue of vanadium suboxide, and recovering said crystalline residue remaining in said boat.
Claim 2
Dependent Claim
98 words
Process for the preparation of vanadium suboxide having the formula VOx wherein x is comprised between 1.5 and 2.02 which comprises evaporating vanadium pentoxide in an inert boat in a bell jar at a temperature in the range of 400* to 600* C. under a pressure in the range of 10 1 mm. Hg to 10 4 mm. Hg, simultaneously evacuating the bell jar for eliminating the evaporated vanadium pentoxide until all vanadium pentoxide is evaporated leaving a residue of vanadium suboxide in said boat, and recovering said vanadium suboxide remaining in said boat in a bulk form.
Claim 3
Dependent Claim
91 words
Process for the preparation of vanadium suboxide having the formula VOx wherein x is comprised between 1.5 and 2.02 which comprises evaporating vanadium pentoxide in an inert boat in a bell jar at a temperature in the range of 450* to 550* C. under a pressure of substantially 10 2 mm. Hg, simultaneously evacuating the bell jar for eliminating the evaporated vanadium pentoxide until all vanadium pentoxide is evaporated leaving a residue of vanadium suboxide in said boat, and recovering said vanadium suboxide remaining in said boat in a bulk form.
References Cited (Backward Citations)
US2441447A
Cited
US3378350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |