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US2531907A
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US
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Pressure fluid servomotor
Assignee: Individual
•
Filing: 1946-02-01
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Granted: 1950-11-28
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Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Daubenmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:30
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/12; F15B11/121; F15B11/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE301531C
Cited
US553679A
Cited
US686352A
Cited
GB191400695A
Cited
US1865105A
Cited
US1956906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |