Patent US2482633A successfully refreshed from Google Patents.
US2482633A
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Sharpening unit
Assignee: L O NICHOLS
•
Filing: 1946-12-26
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Granted: 1949-09-20
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Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Stephen G Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:52
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US196333A
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US457148A
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US1346804A
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US1925108A
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CH169422A
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GB500678A
Cited
US2283385A
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US2432534A
Cited
US2432535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |