Patent US2843151A successfully refreshed from Google Patents.
US2843151A
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Hydraulic power element
Assignee: Robertshaw US Holding Corp
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Filing: 1953-03-27
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Granted: 1958-07-15
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Greenawalt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:04
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; F15; F15B; F15B15/00; F15B15/08; F15B15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1959265A
Cited
US1924888A
Cited
US1994388A
Cited
US2114091A
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GB577283A
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US2307671A
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US2532143A
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US2642747A
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US2534497A
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US2467629A
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US2654559A
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FR1048184A
Cited
US2681800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |