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US2445442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupter
Assignee: Westinghouse Electric Corp
•
Filing: 1944-08-31
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Granted: 1948-07-20
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Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 Winthrop M Leeds
- 👤 Robert E Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:11
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/98
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2020995A
Cited
US2102768A
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USRE21848E
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US2155263A
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GB486050A
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US2387589A
Cited
GB500731A
Cited
US2258226A
Cited
US2292547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |