Patent US2972684A successfully refreshed from Google Patents.
US2972684A
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US
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Electrical controller
Assignee: Cutler Hammer Inc
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Filing: 1958-06-06
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Granted: 1961-02-21
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Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
- 👤 William H Elliot
- 👤 Gerald L Yager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/041; G05B19/0415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2653299A
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US2600891A
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US2522826A
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US2532287A
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US2654057A
Cited
US2693572A
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US2826072A
Cited
US2859402A
Cited
US2864962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |