Patent US3987739A successfully refreshed from Google Patents.
Patent US2650945A successfully refreshed from Google Patents.
US2650945A
Expired / Lapsed
US
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Primary dry cell
Assignee: Spectrum Brands Inc
•
Filing: 1949-07-08
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Granted: 1953-09-01
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Expires: 1969-07-08
Abstract
No abstract record available.
Inventors
- 👤 William S Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/50; H01M50/543; H01M50/552; H01M50/559; H01M50/56; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PRIMARY DRY CELL COMPRISING A PAIR OF MATCHING CONDUCTIVE, METALLIC CAPS, THE SIDE WALLS OF EACH OF WHICH ARE CRIMPED AROUND FLANGES AT OPPOSITE ENDS OF A HOLLOW-BORED SUBSTANTIALLY RIGID INSULATING SPOOL, THE SIDE WALLS OF WHICH ARE IMPERFORATE, THE SAID METALLIC CAPS HAVING FLAT EXTERIOR FACES WHICH PROVIDE, RESPECTIVELY SYMMETRICAL POSITIVE AND NEGATIVE CELL TERMINALS INSULATED FROM EACH OTHER AND DISPOSED AT OPPOSITE ENDS OF THE CELL, THE SAID CAPS AND THE SAID HOLLOW-BORED INSULATING SPOOL COOPERATING TO FORM A SEALED, SUBSTANTIALLY FLUID-TIGHT, INTERIOR COMPARTMENT WITHIN THE CELL AND WITHIN WHICH CELL REACTANTS INCLUDING DEPOLARIZER ARE DISPOSED.
Claim 2
Dependent Claim
99 words
A PRIMARY DRY CELL COMPRISING A PAIR OF MATCHING CONDUCTIVE, METALLIC CAPS, THE SIDE WALLS OF EACH OF WHICH ARE CRIMPED AROUND FLANGES AT OPPOSITE ENDS OF A HOLLOW-BORED SUBSTANTIALLY RIGID INSULATING SPOOL, THE SIDE WALLS OF WHICH ARE IMPERFORATE, THE SAID METALLIC CAPS HAVING FLAT EXTERIOR FACES WHICH PROVIDE, RESPECTIVELY SYMMETRICAL POSITIVE AND NEGATIVE CELL TERMINALS INSULATED FROM EACH OTHER AND DISPOSED AT OPPOSITE ENDS OF THE CELL, THE SAID CAPS AND THE SAID HOLLOW-BORED INSULATING SPOOL COOPERATING TO FORM A SEALED, SUBSTANTIALLY FLUID-TIGHT, INTERIOR COMPARTMENT WITHIN THE CELL AND WITHIN WHICH CELL REACTANTS INCLUDING DEPOLARIZER ARE DISPOSED.
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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) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |