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US2446307A
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US
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Warp switch
Assignee: Penn Electric Switch Co
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Filing: 1944-09-11
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Granted: 1948-08-03
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Expires: 1964-09-11
Abstract
No abstract record available.
Inventors
- 👤 Burton E Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:44
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/64; H01H37/70; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856; Y10T74/18864
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1763006A
Cited
US2211245A
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US2135864A
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US2189996A
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US2330506A
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US2394121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |