US2864601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auger boring head with non-rotating barrel
Assignee: Salem Tool Co
•
Filing: 1956-08-06
•
Granted: 1958-12-16
•
Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Mccarthy
- 👤 George L Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:16
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1721004A
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US2072320A
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US2177300A
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US2316409A
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US2696367A
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US2647726A
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US2751203A
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US2715526A
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US2712434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |