US2491075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic switch
Assignee: ROBOT APPLIANCES Inc
•
Filing: 1945-05-03
•
Granted: 1949-12-13
•
Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Belsky Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:13
CPC Classifications
H; H01; H01H; H01H36/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US613794A
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US1333004A
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GB119086A
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US1293441A
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US1558277A
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US1725291A
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US1564840A
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CH117634A
Cited
US1992214A
Cited
US2101092A
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US2052911A
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US2149998A
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US2337468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |