Patent US2434538A successfully refreshed from Google Patents.
US2434538A
Expired / Lapsed
US
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Control device
Assignee: Westinghouse Electric Corp
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Filing: 1944-05-16
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Granted: 1948-01-13
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Expires: 1964-05-16
Abstract
No abstract record available.
Inventors
- 👤 Cyril E Baston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:05
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US426538A
Cited
US1965867A
Cited
US2055530A
Cited
US1959786A
Cited
GB459893A
Cited
US2317549A
Cited
US2353610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |