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Patent US2981273A successfully refreshed from Google Patents.
US2981273A
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US
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Electro-hydraulic control device
Assignee: GPE Controls Inc
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Filing: 1958-06-24
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Granted: 1961-04-25
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Expires: 1978-06-24
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Callender
- 👤 Thomas F Graffy
- 👤 Werner G Holzbock
- 👤 Kenneth O Rockey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:56
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/06; F15B9/07; Y; Y10; Y10S; Y10S60/00; Y10S60/907; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993612A
Cited
US1836813A
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US2242807A
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US2715891A
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US2724397A
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US2672150A
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US2713348A
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US2814183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |