Patent US2811873A successfully refreshed from Google Patents.
US2811873A
Expired / Lapsed
US
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Chain saw grinding machine
Assignee: Individual
•
Filing: 1954-10-06
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Granted: 1957-11-05
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Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 Leo J Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:19
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/003; B23D63/08; B23D63/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US106431A
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US142173A
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US145643A
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US175594A
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US261624A
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US327294A
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US1551230A
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US2470290A
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US2666346A
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US2519748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |