US2689531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic machine
Assignee: MELBA L BENEDEK
•
Filing: 1948-10-29
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Granted: 1954-09-21
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 Melba L Benedek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
F; F01; F01B; F01B13/00; F01B13/04; F01B13/06; F01B13/061; F01B13/062; F01B1/00; F01B1/06; F01B1/0641; F01B1/0655; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0435; F03C1/0438; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
Claims Analysis
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References Cited (Backward Citations)
GB244631A
Cited
US1655339A
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US1763565A
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US2130298A
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US2021353A
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US2159245A
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US2213236A
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US2209224A
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US2273468A
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US2452541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |