US2651219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw sharpener
Assignee: Individual
•
Filing: 1950-08-08
•
Granted: 1953-09-08
•
Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph S Tower
- 👤 Fred M Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/12; B23D63/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1456402A
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US1620165A
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US1771602A
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US1803934A
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US1857873A
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US1999322A
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US2249743A
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US2275757A
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US2414731A
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US2439279A
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US2427754A
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US2490244A
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US2568062A
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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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |