US2490214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contacting element
Assignee: Duracell Inc USA
•
Filing: 1945-07-19
•
Granted: 1949-12-06
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 Franz R Hensel
- 👤 Earl I Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1683064A
Cited
GB315818A
Cited
US2198253A
Cited
US2199458A
Cited
US2396101A
Cited
US2391455A
Cited
US2426761A
Cited
US2425052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |