US4315905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an electronically conductive oxidizer material
Assignee: United States Department of the Navy
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Filing: 1980-06-30
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Granted: 1982-02-16
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Expires: 2000-06-30
Abstract
Abstract A method for preparing an electronically conductive oxidizer by heating vdium pentoxide and subjecting it to a flowing reducing gas at about 500° C., forming a product which is electronically conductive at temperatures from about 25° C. to above 450° C. and useful as a cathode material in thermal batteries.
Inventors
- 👤 Everett M. Bens
- 👤 Aaron N. Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A method of producing an electrically conductive oxidizer cathode material for use in thermal batteries consisting of: heating vanadium pentoxide, V 2 O 5 , to a temperature in the range from about 400° C. to about 550° C.; treating said heated V 2 O 5 with a reducing gas flowing at a rate from about 8.2 to 55 milliliters per minute for about 2 hours to 10 days until no water condenses at room temperatures reducing said V 2 O 5 to produce a reduced electrically conductive oxidizer; recovering said reduced product; and sintering said recovered product to V 2 O 5 .
Claim 2
Independent Claim
104 words
A method of producing an electrically conductive oxidizer cathode material for use in thermal batteries consisting of: heating vanadium pentoxide, V 2 O 5 , to a temperature in the range from about 400° C. to about 550° C.; treating said heated V 2 O 5 with a reducing gas flowing at a rate from about 8.2 to 55 milliliters per minute for about 2 hours to 10 days until no water condenses at room temperatures reducing said V 2 O 5 to produce a reduced electrically conductive oxidizer; recovering said reduced product; and sintering said recovered product to V 2 O 5 .
Claim 3
Dependent Claim
67 words
A method as in claim 1 wherein said reducing gas comprises: hydrogen bearing gas flowing at a rate from about 10 milliliters per minute to about 20 milliliters per minute for about 9 hours through said V 2 O 5 heated to about 500° C; and reducing said V 2 O 5 until said resulting electrically conductive oxidizer has a vanadium to oxygen ratio of about 1:2.45.
Claim 4
Dependent Claim
70 words
A method as in claim 1 wherein said reducing gas comprises: helium gas flowing at a rate of about 8.2 milliliters per minute for about 10 days through said V 2 O 5 heated to a temperature in the range from about 500° C. to about 520° C.; and reducing said V 2 O 5 until said resulting electrically conducting oxidizer has a vanadium to oxygen ratio of about 1:2.44.
Claim 5
Dependent Claim
88 words
A method as in claim 1 wherein said reducing gas consists of: a mixture of 6% H 2 by volume with 94% N 2 by volume flowing at a rate of about 55 milliliters per minute for about 21 hours to about 30 hours through said V 2 O 5 heated to a temperature ranging from about 420° C. to about 500° C.; and reducing said V 2 O 5 until said resulting electrically conductive oxidizer has a vanadium to oxygen ratio of about 1:1.80 to about 1:1.85.
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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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |