US2615683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1944-10-23
•
Granted: 1952-10-28
•
Expires: 1964-10-23
Abstract
No abstract record available.
Inventors
- 👤 Mccallum Robert Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/081; Y; Y10; Y10T; Y10T74/00; Y10T74/17; Y10T74/173; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18664; Y10T74/18696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US812886A
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US1087089A
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US1040867A
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US1202030A
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US1741044A
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US1909099A
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US2167673A
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US2307317A
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US2317549A
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US2310990A
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US2327769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |