US2739914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese dioxide depolarizer
Assignee: Manganese Chemicals Corp
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Filing: 1954-05-19
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Granted: 1956-03-27
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Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Babbitt
- 👤 Jay Y Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
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: 1
Claim 1
Independent Claim
39 words
AS A DEPOLARIZER, FINELY SUB-DIVIDED PARTICLES OF MANGANESE DIOXIDE PRODUCED BY OXIDATION OF MANGANESE CARBONATE, SAID PARTICLES OF MANGANESE DIOXIDE HAVING A GAMMA CRYSTAL STRUCTURE AND BEING PRECIPITATED ON CARRIER PARTICLES OF AT LEAST PARTICALLY LEACHED MANGANESE DIOXIDE ORE.
References Cited (Backward Citations)
US1448110A
Cited
US2655456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |