Patent US2716252A successfully refreshed from Google Patents.
Patent US4619822A successfully refreshed from Google Patents.
US4619822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel process for the synthesis of vanadium oxide, V6 O13
Assignee: NATIONALE ELF AQUITAINE TOUR AQUITAINE Ste
•
Filing: 1985-04-24
•
Granted: 1986-10-28
•
Expires: 2005-04-24
Abstract
Abstract Process for the synthesis of vanadium V 6 O 13 by reduction of V 2 O 5 in the presence of reducing gas. The reducing gas is a mixture of CO and CO 2 .
Inventors
- 👤 Abdelkader Hammou
- 👤 Philippe Rigaud
- 👤 Catherine Rousseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; C; C01; C01G; C01G31/00; C01G31/02; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
In a process for preparing V 6 O 13 by reducing V 2 O 5 at high temperatures, the improvement comprising reducing V 2 O 5 with a gaseous mixture of carbon monoxide and carbon dioxide to obtain substantially pure V 6 O 13 , wherein the said gaseous mixture contains between 5 and 15 percent by volume of carbon monoxide.
Claim 2
Dependent Claim
61 words
In a process for preparing V 6 O 13 by reducing V 2 O 5 at high temperatures, the improvement comprising reducing V 2 O 5 with a gaseous mixture of carbon monoxide and carbon dioxide to obtain substantially pure V 6 O 13 , wherein the said gaseous mixture contains between 5 and 15 percent by volume of carbon monoxide.
Claim 3
Dependent Claim
13 words
The process of claim 1, comprising using about 10% by volume carbon monoxide.
Claim 4
Dependent Claim
40 words
The process of claim 1, comprising passing the said gaseous mixture of carbon monoxide and carbon dioxide over the said V 2 O 5 at a rate of from 15 to 20 liters per hour for at least 2 hours.
Claim 5
Dependent Claim
46 words
The process of claim 1, comprising passing the said gaseous mixture of carbon monoxide and carbon dioxide over the said V 2 O 5 at a rate of from 15 to 20 liters per hour for a length of time of from 4 to 5 hours.
Claim 6
Dependent Claim
13 words
The process of claim 1, comprising using a temperature of about 600° C.
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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |