US2708684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary cell
Assignee: Burgess Battery Co
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Filing: 1953-12-03
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Granted: 1955-05-17
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Expires: 1973-12-03
Abstract
No abstract record available.
Inventors
- 👤 John I Grieve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:34
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
IN A PRIMARY CELL HAVING A POSITIVE ELECTRODE, A NEGATIVE ELECTRODE AND ELECTROLYTE-RETAINING ELEMENTS INCLUDING A DEPOLARIZER BODY BETWEEN SAID ELECTRODES, A SEALING WRAPPER COMPRISING AN IMPERVIOUS, NON-CONDUCTIVE, ELECTROLYTE-RESISTANT THERMOPLASTIC SHEET STRETCHED UNDER HEAT AND TENSION ABOUT THE EXTERIOR OF SAID CELL AND DRAWN BY TWISTING INTO CONTACT WITH THE SURFACE OF SAID CELL.
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) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |