US3795545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak-proof zinc chloride dry cell
Assignee: Individual
•
Filing: 1970-10-19
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Granted: 1974-03-05
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Expires: 1990-10-19
Abstract
Abstract THE INVENTION RELATES TO A LEAK-PROOF DRY CELL IN WHICH THE ZINC CATHODE CANISTER IS ENCLOSED IN A PLASTICS CASING AND THE ELECTROLYTE SOLUTION CONSISTS MAINLY OF ZINC CHLORIDE WITH A SMALL PROPORTION OF AMMONIUM CHLORIDE WHEREBY THE PRODUCTION OF FINE COMPLEX CRYSTALS IS AVOIDED. THE ZINC CANISTER IS THIN-WALLED SO THAT IT IS CONSUMED BY THE TIME THE CELL VOLTAGE DROPS BELOW IS USEFUL VOLTAGE. THIS AVOIDS THE PRODUCTION OF HYDROGEN GAS AS WELL AS A SAVING OF ZINC. THE ZINC CANISTER IS CONNECTED TO ITS OUTER TERMINAL BY A ZINC PEG OR RIVET ON ITS BASE WHICH PASSES THROUGH A HOLE IN THE BOTTOM OF THE PLASTICS CASING.
Inventors
- 👤 T Kamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/08
Claims Analysis
Total Claims: 0
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |