Patent US2137617A successfully refreshed from Google Patents.
US2137617A
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Electrical contact and method of making the same
Assignee: Duracell Inc USA
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Filing: 1936-03-04
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Granted: 1938-11-22
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Expires: 1956-03-04
Abstract
No abstract record available.
Inventors
- 👤 Robert H Imes
- 👤 Hal F Fruth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H11/041; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/12201; Y10T428/12361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-11-21 | 1942-05-23 | 1942-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-21 | 1946-05-23 | 1946-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-21 | 1950-05-23 | 1950-11-22 | $7700.00 | Window Closed / Lapsed |