Patent US2722918A successfully refreshed from Google Patents.
US2722918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air impact hammer
Assignee: Individual
•
Filing: 1951-03-02
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Granted: 1955-11-08
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 James F Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:47
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US558652A
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US906240A
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US1122630A
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US1174869A
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US1175621A
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US1440082A
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US1486486A
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US1535659A
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US2413542A
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US2585975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |