Patent US2790022A successfully refreshed from Google Patents.
US2790022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washer for use in primary cells
Assignee: Dow Chemical Co
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Filing: 1956-03-21
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Granted: 1957-04-23
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Expires: 1976-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles W Glesner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:08
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/08; H01M50/00; H01M50/30; H01M50/394; H01M50/10; H01M50/147; H01M50/148; H01M50/154
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PRIMARY CELL HAVING A MAGNEISUM ANODE DISPOSED IN A BATTERY CAN AND ELECTRICALLY CONNECTED TO AN EXTERNAL SURFACE OF SAID CAN, A CARBON CATHODE DISPOSED IN THE CAN WITH ONE END PROJECTING OUTWARDLY OF THE CAN BEYOND THE RIM, A CATHODE DEPOLARIZING MIXTURE COMPRISING MANGANESE DIOXIDE AND CARBON BLACK MOISTENED WITH AN AQUEOUS ELECTROLYTE, THE SAID MIXTURE BEING INTERPOSED BETWEEN THE INSIDE OF THE ANODE AND THE CARBON CATHODE BELOW THE RIM OF THE CAN, AND A MOLDABLE SEALING
Claim 2
Dependent Claim
81 words
IN A PRIMARY CELL HAVING A MAGNEISUM ANODE DISPOSED IN A BATTERY CAN AND ELECTRICALLY CONNECTED TO AN EXTERNAL SURFACE OF SAID CAN, A CARBON CATHODE DISPOSED IN THE CAN WITH ONE END PROJECTING OUTWARDLY OF THE CAN BEYOND THE RIM, A CATHODE DEPOLARIZING MIXTURE COMPRISING MANGANESE DIOXIDE AND CARBON BLACK MOISTENED WITH AN AQUEOUS ELECTROLYTE, THE SAID MIXTURE BEING INTERPOSED BETWEEN THE INSIDE OF THE ANODE AND THE CARBON CATHODE BELOW THE RIM OF THE CAN, AND A MOLDABLE SEALING
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |