Patent US2525270A successfully refreshed from Google Patents.
US2525270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric primary cell
Assignee: Philips North America LLC
•
Filing: 1945-02-21
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Granted: 1950-10-10
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Expires: 1965-02-21
Abstract
No abstract record available.
Inventors
- 👤 Quinnell La Vern Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:41
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A DRY BATTERY COMPOSED OF A STACK OF PRIMARY CELLS, EACH CELL COMPRISING AN IMPERFORATE BIMETALLIC SHEET METAL CUP HAVING A BOTTOM AND OUTWARDLY TAPERED WALLS INTEGRAL WITH THE BOTTOM AROUND ITS MARGINAL EDGES; SAID CUPS BEING NESTED INTO EACH OTHER IN INTERFITTING RELATION, WITH THE LOWER OUTSIDE SURFACES OF EACH INTERMEDIATE CUP FITTED WITHIN TH EUPPER INSIDE SURFACES OF THE NEXT ADJACENT CUP; THE WALLS OF THE CUPS INCLUDING A LAYER OF INSULATING AND SEALING MATERIAL EXTENDING THROUGHOUT THE INSIDE AREA OF SAID SAPERED WALLS; TOGETHER WITH A CATHODE CONSISTING OF A DEPOLRIZING BODY EXTENDING ACROSS THE BOTTOM OF THE CUP AND ABOVE THE LOWER EDGES OF THE INSULATING LAYER OF THE CUP WALLS AND IN INTIMATE CONTACT WITH THE INSIDE METAL LAYER OF THE CUP ACROSS ITS BOTTOM, A METALLIC ANODE IN THE CUP ABOVE THE CATHODE AND IN CON
Claim 2
Dependent Claim
142 words
A DRY BATTERY COMPOSED OF A STACK OF PRIMARY CELLS, EACH CELL COMPRISING AN IMPERFORATE BIMETALLIC SHEET METAL CUP HAVING A BOTTOM AND OUTWARDLY TAPERED WALLS INTEGRAL WITH THE BOTTOM AROUND ITS MARGINAL EDGES; SAID CUPS BEING NESTED INTO EACH OTHER IN INTERFITTING RELATION, WITH THE LOWER OUTSIDE SURFACES OF EACH INTERMEDIATE CUP FITTED WITHIN TH EUPPER INSIDE SURFACES OF THE NEXT ADJACENT CUP; THE WALLS OF THE CUPS INCLUDING A LAYER OF INSULATING AND SEALING MATERIAL EXTENDING THROUGHOUT THE INSIDE AREA OF SAID SAPERED WALLS; TOGETHER WITH A CATHODE CONSISTING OF A DEPOLRIZING BODY EXTENDING ACROSS THE BOTTOM OF THE CUP AND ABOVE THE LOWER EDGES OF THE INSULATING LAYER OF THE CUP WALLS AND IN INTIMATE CONTACT WITH THE INSIDE METAL LAYER OF THE CUP ACROSS ITS BOTTOM, A METALLIC ANODE IN THE CUP ABOVE THE CATHODE AND IN CON
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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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |