Patent US2547003A successfully refreshed from Google Patents.
US2547003A
Expired / Lapsed
US
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Electromagnetic switch
Assignee: Individual
•
Filing: 1946-02-04
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Granted: 1951-04-03
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Expires: 1966-02-04
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hastings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US996713A
Cited
US2289830A
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US2187115A
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US2181296A
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US2264124A
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US2332338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |