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Patent US2673071A successfully refreshed from Google Patents.
US2673071A
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US
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Rock drill
Assignee: Joy Manufacturing Co
•
Filing: 1946-06-07
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Granted: 1954-03-23
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Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
- 👤 John C Curtis
- 👤 Edward A Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; E21B19/02; E21B19/06; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1551214A
Cited
US1851599A
Cited
US1921341A
Cited
US2035156A
Cited
US2338625A
Cited
US2365749A
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 |