Patent US2586842A successfully refreshed from Google Patents.
US2586842A
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US
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Drilling apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1944-10-16
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Granted: 1952-02-26
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Expires: 1964-10-16
Abstract
No abstract record available.
Inventors
- 👤 Mccallum Robert Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:00
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/081; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19451; Y10T74/19456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321393A
Cited
US535451A
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US741320A
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US1177110A
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US1977061A
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US1977490A
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US1935211A
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US2202554A
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US2041578A
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US2160274A
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US2233822A
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US2177011A
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US2293617A
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US2331179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |