Patent US2418601A successfully refreshed from Google Patents.
US2418601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth drill
Assignee: BUDA CO
•
Filing: 1944-01-19
•
Granted: 1947-04-08
•
Expires: 1964-01-19
Abstract
No abstract record available.
Inventors
- 👤 Richards Dwight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:57
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US811317A
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US1397324A
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US1674189A
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US1635848A
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US1779480A
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US1887172A
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US1966008A
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US2251013A
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US2200075A
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US2255241A
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US2343517A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |