US2482820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Periodic electromagnetic relay
Assignee: International Standard Electric Corp
•
Filing: 1943-04-17
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Granted: 1949-09-27
•
Expires: 1963-04-17
Abstract
No abstract record available.
Inventors
- 👤 Wolfson Henry
- 👤 Shepard Stanley Carden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:20
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/308
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2001498A
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DE640150C
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US2179826A
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US2244058A
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US2304613A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |