Patent US2579680A successfully refreshed from Google Patents.
US2579680A
Expired / Lapsed
US
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Planer blade grinding attachment
Assignee: Individual
•
Filing: 1949-08-03
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Granted: 1951-12-25
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Expires: 1969-08-03
Abstract
No abstract record available.
Inventors
- 👤 Charles R Leighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US62071A
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US335984A
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US442788A
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US582674A
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US818933A
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US1401560A
Cited
US1385649A
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US2052837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |