Patent US2597077A successfully refreshed from Google Patents.
US2597077A
Expired / Lapsed
US
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Control system
Assignee: Westinghouse Electric Corp
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Filing: 1947-11-14
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Granted: 1952-05-20
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Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 George R Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0816; G05D1/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637039A
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GB384158A
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US1937375A
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US2415429A
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US2415430A
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US2416097A
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US2516796A
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US2471821A
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US2464629A
Cited
US2516641A
Cited
US2553597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |