Patent US2571244A successfully refreshed from Google Patents.
US2571244A
Expired / Lapsed
US
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Earth auger
Assignee: AB Chance Co
•
Filing: 1949-03-12
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Granted: 1951-10-16
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Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 William L Hollander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:58
CPC Classifications
E; E21; E21B; E21B11/00; E21B11/005; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US6970A
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US256039A
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US537157A
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US570810A
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US677403A
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US1076817A
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US1114206A
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US1142646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |