Patent US2672847A successfully refreshed from Google Patents.
US2672847A
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US
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Reciprocable hydraulic impact motor
Assignee: LE ROI Co
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Filing: 1950-06-10
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Granted: 1954-03-23
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Expires: 1970-06-10
Abstract
No abstract record available.
Inventors
- 👤 Carl A Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:43
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US320293A
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US660434A
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US1087799A
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US1104946A
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US1558221A
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US2166940A
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GB501146A
Cited
US2512763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |