US2591532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depolarizer for primary cells
Assignee: Manganese Battery Corp
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Filing: 1950-02-01
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Granted: 1952-04-01
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Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 Abraham L Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:26
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; H01M6/00; H01M6/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A PRIMARY CELL CONSISTING OF A METALLIC ANODE AND AN ELECTROLYTE IN WHICH THE ANODE DISSOLVES ELECTROCHEMICALLY AND A DEPOLARIZER CONSISTING OF FINELY DIVIDED CARBON AND PARTICLES OF MANGANESE DIOXIDE PASSING A STANDARD SIEVE HAVING 20 MESHES AND REMAIN ON ONE HAVING 200 MESHES TO THE LINEAR INCH, HAVING AN ELECTRICAL RESISTIVITY OF 4-10 OHMS PER CM.3, SAID PARTICLES BEING OF SUCH CHARACTER THAT WHEN GROUND TO PASS A STANDARD SCREEN HAVING 200 MESHES TO THE LINEAR INCH DEPOLARIZING PROPERTIES WHEN USED IN A LE CLANCHE CELL AT LEAST AS GOOD AS STANDARD AFRICIAN ORE.
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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |