Patent FR1216838A successfully refreshed from Google Patents.
US2682227A
Expired / Lapsed
US
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Hydraulic control apparatus
Assignee: Individual
•
Filing: 1950-07-11
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Granted: 1954-06-29
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 John G Burris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:31
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1008816A
Cited
GB265275A
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US2018150A
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US2161828A
Cited
US2317119A
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US2336526A
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US2433220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |