Patent US2597292A successfully refreshed from Google Patents.
US2597292A
Expired / Lapsed
US
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Power-driven jackhammer
Assignee: Individual
•
Filing: 1949-04-30
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Granted: 1952-05-20
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Expires: 1969-04-30
Abstract
No abstract record available.
Inventors
- 👤 Oscar S Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:30
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06; B; B25; B25D; B25D11/00; B25D11/06; B25D11/10; B25D11/102; B25D2211/00; B25D2211/06; B25D2211/062; B25D2211/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1034010A
Cited
US1014979A
Cited
US1283601A
Cited
US2353321A
Cited
US2327619A
Cited
US2457565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |