US2800551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay
Assignee: Electric Machinery Manufacturing Co
•
Filing: 1953-09-17
•
Granted: 1957-07-23
•
Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Crownover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:13
CPC Classifications
H; H01; H01H; H01H57/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB201679A
Cited
US1733085A
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US2207539A
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US2332518A
Cited
US2387108A
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US2466053A
Cited
US2471967A
Cited
US2497108A
Cited
US2640889A
Cited
US2706326A
Cited
US2714642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |