US2619628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converter with electromagnetic switches
Assignee: Individual
•
Filing: 1946-03-23
•
Granted: 1952-11-25
•
Expires: 1966-03-23
Abstract
No abstract record available.
Inventors
- 👤 Kesselring Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:33
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/30; H02M7/32; H02M7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1812312A
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US1870064A
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US2011395A
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US2276784A
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US2215471A
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US2316170A
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US2293296A
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US2375609A
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US2361155A
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US2366984A
Cited
GB613540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |