US2453267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic switching device
Assignee: Individual
•
Filing: 1945-03-07
•
Granted: 1948-11-09
•
Expires: 1965-03-07
Abstract
No abstract record available.
Inventors
- 👤 Peter F Rossmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US706540A
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US936329A
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FR395139A
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US1186561A
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US1498818A
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US1564815A
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US1548800A
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US1783900A
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US1724924A
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US1902490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |