US2469609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic switching system
Assignee: General Controls Co
•
Filing: 1944-01-01
•
Granted: 1949-05-10
•
Expires: 1964-01-01
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314332A
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GB190616359A
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US1015968A
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US1301412A
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US1424140A
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US2164694A
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US2260810A
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US2297339A
Cited
US2351277A
Cited
US2287617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |