US3623915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric dry cells
Assignee: Individual
•
Filing: 1969-07-16
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Granted: 1971-11-30
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Expires: 1989-07-16
Abstract
Abstract AN ELECTRIC DRY CELL HAVING THE OPEN END OF ITS CUP ELECTRODE CLOSED BY A MOULDED PLASTICS PLUG WHICH IS GRIPPED AROUND ITS PERIPHERY BY THE INTURNED END OF THE CUP AND HAS A CENTRAL APERTURE EMBRACING THE ROD ELECTRODE, ANNULAR SPACES FILLED WITH SEALING MATERIAL BEING PROVIDED RESPECTIVELY BETWEEN THE PERIPHERY OF THE PLUG AND THE WALL OF THE CUP ELECTRODE, AND BETWEEN THE ROD ELECTRODE AND THE WALL OF THE CENTRAL APERTURE IN THE PLUG.
Inventors
- 👤 Ching-Koon Pun
- 👤 Ching-Chau Poon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:46
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |