US2525436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cell
Assignee: Individual
•
Filing: 1945-03-27
•
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 08:50
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.
References Cited (Backward Citations)
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Cited
US1387350A
Cited
US1366298A
Cited
US1737718A
Cited
US1920799A
Cited
US2111041A
Cited
US2352759A
Cited
US2482514A
Cited
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 |