Patent US2525436A successfully refreshed from Google Patents.
US2525436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cell
Assignee: Individual
•
Filing: 1945-03-27
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Granted: 1950-10-10
•
Expires: 1965-03-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:04
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/50; H01M50/543; H01M50/552; H01M50/559; H01M50/56; H01M50/30; H01M50/342; H01M50/3425; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
AN ENCLOSED DRY CELL COMPRISING IN COMBINATION ELECTRODE ELEMENTS, AN ELECTROLYTE THEREFOR, A RIGID METAL WALL IN ELECTRICAL CONNECTION WITH ONE OF SAID ELECTRODE ELEMENTS AND CONSTITUTING PART OF THE CELL ENCLOSURE, AND AN ELONGATED NARROW GROOVE FORMED IN SAID WALL PROVIDING AN INTEGRAL LINEAR WALL PORTION OF REDUCED THICKNESS, SAID WALL PORTION OF REDUCED THICKNESS CONSTITUTING A POSTIVELY DETERMINED TEAR LINE ALONG WHICH SAID WALL SPLIT IN RESPONSE TO EXCESSIVE INTERNAL GAS PRESSURE.
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US2482514A
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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 |