Patent US5437786A successfully refreshed from Google Patents.
Patent US2425106A successfully refreshed from Google Patents.
US2425106A
Expired / Lapsed
US
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Method of sharpening lawn mowers
Assignee: Individual
•
Filing: 1944-06-20
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Granted: 1947-08-05
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Expires: 1964-06-20
Abstract
No abstract record available.
Inventors
- 👤 Madsen Nils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:41
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE349059C
Cited
US1287073A
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US1367703A
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US1497650A
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US1513276A
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US2174204A
Cited
US2204293A
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US2343072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |