Patent US2729987A successfully refreshed from Google Patents.
US2729987A
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US
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Chain saw sharpener
Assignee: DUMORE CO
•
Filing: 1952-07-07
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Granted: 1956-01-10
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Expires: 1972-07-07
Abstract
No abstract record available.
Inventors
- 👤 Gary G Bluemink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:39
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/16; B23D63/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1771602A
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US2178264A
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US2344478A
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US2422871A
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US2430984A
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US2439279A
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US2568062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |