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US2667144A
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US
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Rotary and impact tool
Assignee: Hughes Tool Co
•
Filing: 1949-11-21
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Granted: 1954-01-26
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Expires: 1969-11-21
Abstract
No abstract record available.
Inventors
- 👤 Evans Seth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US910447A
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US1087632A
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US1132063A
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US1892517A
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US2359147A
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US2390646A
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US2424108A
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US2422031A
Cited
US2507585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |