Patent US2427754A successfully refreshed from Google Patents.
US2427754A
Expired / Lapsed
US
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Saw sharpener
Assignee: Individual
•
Filing: 1946-07-09
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Granted: 1947-09-23
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Expires: 1966-07-09
Abstract
No abstract record available.
Inventors
- 👤 Charles G Wahlstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:12
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US175594A
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US261624A
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US348168A
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US626451A
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US1146705A
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US1557494A
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US1874315A
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US1780886A
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US1852518A
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DE672577C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |