Patent US2663126A successfully refreshed from Google Patents.
US2663126A
Expired / Lapsed
US
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Apparatus for sharpening drills
Assignee: Individual
•
Filing: 1950-09-06
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Granted: 1953-12-22
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Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 Amiet Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:30
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US299433A
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US302726A
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US748651A
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US641107A
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US1994975A
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US2024268A
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US2142923A
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US2232563A
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US2411591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |