US2655456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese dioxide for primary cells
Assignee: Manganese Battery Corp
•
Filing: 1951-03-05
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Granted: 1953-10-13
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Expires: 1971-03-05
Abstract
No abstract record available.
Inventors
- 👤 Gullett William Waitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:05
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF PRODUCING COMPOSITE PARTICLES OF CHEMICAL SYNTHETIC MANGANESE DIOXIDE AND GRAPHITE HAVING A BULK DENSITY OF 15-23 GRAMS PER CUBIC INCH WHICH INCLUDES THE STEPS OF MIXING CHEMICAL SYNTHETIC MANGANESE DIOXIDE WITH 1-515% BY WEIGHT GRAPHITE POWDER, PRESSING THE MIXTURE AT A TEMPERATURE BETWEEN 400* F. AND 650* F. AND A PRESSURE OF 10-50 TONS PER SQUARE INCH, COOLING THE PELLET SO FORMED, AND COMMINUTING IT SO THAT THE RESULTING PARTICLES WILL ALL PASS A STANDARD SCREEN HAVING 60 MESHES TO THE LINEAR INCH AND AT LEAST 80% BY WEIGHT OF THE PARTICLES WILL REMAIN ON A SCREEN HAVING 200 MESHES TO THE LINEAR INCH.
Claim 2
Independent Claim
107 words
THE METHOD OF PRODUCING COMPOSITE PARTICLES OF CHEMICAL SYNTHETIC MANGANESE DIOXIDE AND GRAPHITE HAVING A BULK DENSITY OF 15-23 GRAMS PER CUBIC INCH WHICH INCLUDES THE STEPS OF MIXING CHEMICAL SYNTHETIC MANGANESE DIOXIDE WITH 1-515% BY WEIGHT GRAPHITE POWDER, PRESSING THE MIXTURE AT A TEMPERATURE BETWEEN 400* F. AND 650* F. AND A PRESSURE OF 10-50 TONS PER SQUARE INCH, COOLING THE PELLET SO FORMED, AND COMMINUTING IT SO THAT THE RESULTING PARTICLES WILL ALL PASS A STANDARD SCREEN HAVING 60 MESHES TO THE LINEAR INCH AND AT LEAST 80% BY WEIGHT OF THE PARTICLES WILL REMAIN ON A SCREEN HAVING 200 MESHES TO THE LINEAR INCH.
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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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |