US2641622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric primary cell
Assignee: Magnesium Elektron Ltd
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Filing: 1952-04-25
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Granted: 1953-06-09
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 William F Higgins
- 👤 Wilkinson Robert Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/50; H01M6/5005; H01M4/00; H01M4/02; H01M4/06; H01M6/04; H01M6/06; H01M6/5072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ELECTRIC DRY CELL HAVING A CONSUMABLE METAL ANODE, A CATHODE, AN ELECTROLYTE, AND A SACRIFICIAL ANODE MADE OF A METAL OR ALLOY MORE ELECTROPOSITIVE THAN THE SAID METAL ANODE, THE SACRIFICIAL ANODE ALLOWING THE METAL ANODE TO BE CONSUMED DURING NORMAL USE OF THE CELL BUT MINIMISING THE CORROSION OF THE METAL ANODE DURING PERIODS WHEN THE CELL IS NOT IN USE.
Claim 2
Dependent Claim
63 words
AN ELECTRIC DRY CELL HAVING A CONSUMABLE METAL ANODE, A CATHODE, AN ELECTROLYTE, AND A SACRIFICIAL ANODE MADE OF A METAL OR ALLOY MORE ELECTROPOSITIVE THAN THE SAID METAL ANODE, THE SACRIFICIAL ANODE ALLOWING THE METAL ANODE TO BE CONSUMED DURING NORMAL USE OF THE CELL BUT MINIMISING THE CORROSION OF THE METAL ANODE DURING PERIODS WHEN THE CELL IS NOT IN USE.
References Cited (Backward Citations)
US1856386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |