Patent US2500777A successfully refreshed from Google Patents.
US2500777A
Expired / Lapsed
US
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Control arrangement for fluid operated circuit breakers
Assignee: General Electric Co
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Filing: 1945-04-20
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Granted: 1950-03-14
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Expires: 1965-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Julius W Timmerman
- 👤 Ralph E Bold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:25
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US410183A
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US560230A
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US653187A
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US932244A
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US1990741A
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US2207806A
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US2281337A
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US2372729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |