Patent US2549147A successfully refreshed from Google Patents.
US2549147A
Expired / Lapsed
US
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Portable knife grinder for woodworking machines
Assignee: Individual
•
Filing: 1948-01-29
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Granted: 1951-04-17
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Expires: 1968-01-29
Abstract
No abstract record available.
Inventors
- 👤 Bruce G Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:08
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US609301A
Cited
US856726A
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US1085876A
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US1799109A
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US2347800A
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US2282145A
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US2450157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |