Patent US2456936A successfully refreshed from Google Patents.
US2456936A
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US
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Regulator system
Assignee: Westinghouse Electric Corp
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Filing: 1947-04-16
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Granted: 1948-12-21
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Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 Harold G Frostick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:44
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1994076A
Cited
US2007751A
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US2119715A
Cited
US1957064A
Cited
US2121588A
Cited
US2442003A
Cited
US2419988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |