US2597873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic switching device for controlling electric circuits
Assignee: Fkg Fritz Kesselring Geratebau AG
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Filing: 1947-02-24
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Granted: 1952-05-27
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Expires: 1967-02-24
Abstract
No abstract record available.
Inventors
- 👤 Kesselring Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/20; H02M1/28; D; D21; D21F; D21F1/00; D21F1/02; D21F1/48; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/30; H02M1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1364898A
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US1426993A
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US1858876A
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US1886372A
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US2422861A
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US2445401A
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US2499632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |