US2745894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary dry cell
Assignee: Spectrum Brands Inc
•
Filing: 1952-06-19
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Granted: 1956-05-15
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Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 Glenn J Nowotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:13
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46; H01M50/00; H01M50/50; H01M50/502
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
A PRIMARY DRY CELL COMPRISING A FLEXIBLE NON-CONDUCTIVE PLASTIC ENVELOPE FORMED BY SEALING THE MARGINAL EDGES OF AT LEAST ONE SHEET OF SUCH PLASTIC, POSITIVE AND NEGATIVE ELECTRODES AND AN ELECTROLYTE WITHIN SAID ENVELOPE, SAID NEGATIVE ELECTRODE COMPRISING A SUBSTANTIALLY FLAT PIECE OF SHEET METAL DISPOSED ONE PORTION OF THE ENVELOPE, SAID POSITIVE ELECTRODE COMPRISING A SHEET OF CONDUCTIVE PLASTIC THE MARGINAL EDGES OF WHICH ARE SEALED TO A PORTION OF THE INNER SURFACE OF SAID PLASTIC ENVELOPE OPPOSITE THE PORTION ON WHICH THE NEGATIVE ELECTRODE IS DISPOSED, THEREBY FORMING AN INTERIOR POCKET, AND A METAL COLLECTOR ELEMENT DISPOSED WITHIN SAID POCKET, SAID METAL COLLECTOR ELEMENT BEING A PLATE OF SHEET METAL HAVING AN ELEVATED SHARP SURFACE PORTION ADAPTED TO PUNCTURE THE OVERLYING NON-CONDUCTIVE PLASTIC ENVELOPE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |