US2557679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic synchronizing system
Assignee: Individual
•
Filing: 1949-06-06
•
Granted: 1951-06-19
•
Expires: 1969-06-06
Abstract
No abstract record available.
Inventors
- 👤 Harry J Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
G; G05; G05D; G05D13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1154785A
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US1841157A
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US2060433A
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US2128980A
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US2224177A
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US2269332A
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US2280203A
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US2272678A
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US2254970A
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US2423400A
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US2340994A
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US2339989A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |