US2608466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing active from of manganese dioxide
Assignee: REGINALD S DEAN
•
Filing: 1948-12-15
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Granted: 1952-08-26
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Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 Abraham L Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:06
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; C; C01; C01G; C01G45/00; C01G45/02; C01G45/022; C01G45/024; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF PRODUCING A MANGANESE OXIDE SUITABLE FOR DEPOLARIZATION OF DRY CELLS WHICH INCLUDES THE STEPS OF PARTIALLY OXIDIZING COMPLETELY CRYSTALLINE PRECIPITATED MANGANESE CARBONATE OF A PARTICLE SIZE .25 TO 6 MICRONS BY HEATING IN AN ATMOPHERE CONTAINING OXYGEN TO A TEMPERATURE FROM 300* TO 600* F. CARBONATING SAID OXIDIZED CARBONATE BY TREATMENT WITH CARBON DIOXIDE AND WATER, AND THEN FURTHER OXIDIZING THE CARBONATED PRODUCT BY HEATING TO A TEMPERATURE OF 300* TO 600* F. CARBONATCONTAINING OXYGEN.
Claim 2
Independent Claim
78 words
THE METHOD OF PRODUCING A MANGANESE OXIDE SUITABLE FOR DEPOLARIZATION OF DRY CELLS WHICH INCLUDES THE STEPS OF PARTIALLY OXIDIZING COMPLETELY CRYSTALLINE PRECIPITATED MANGANESE CARBONATE OF A PARTICLE SIZE .25 TO 6 MICRONS BY HEATING IN AN ATMOPHERE CONTAINING OXYGEN TO A TEMPERATURE FROM 300* TO 600* F. CARBONATING SAID OXIDIZED CARBONATE BY TREATMENT WITH CARBON DIOXIDE AND WATER, AND THEN FURTHER OXIDIZING THE CARBONATED PRODUCT BY HEATING TO A TEMPERATURE OF 300* TO 600* F. CARBONATCONTAINING OXYGEN.
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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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |