Patent US2639344A successfully refreshed from Google Patents.
US2639344A
Expired / Lapsed
US
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Electric switch
Assignee: Individual
•
Filing: 1949-08-16
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Granted: 1953-05-19
•
Expires: 1969-08-16
Abstract
No abstract record available.
Inventors
- 👤 Ernst W Rickmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/14; H01H13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US804389A
Cited
US1256210A
Cited
US1670649A
Cited
US1716373A
Cited
US2409483A
Cited
US2440943A
Cited
US2516584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |