Patent US2419940A successfully refreshed from Google Patents.
US2419940A
Expired / Lapsed
US
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Grinding machine
Assignee: Landis Tool Co
•
Filing: 1944-03-03
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Granted: 1947-05-06
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Expires: 1964-03-03
Abstract
No abstract record available.
Inventors
- 👤 Harold E Balsiger
- 👤 John A Boller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:01
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1733092A
Cited
DE651895C
Cited
US1483748A
Cited
US1733087A
Cited
US1733090A
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US1892453A
Cited
US1842375A
Cited
US1887154A
Cited
DE549128C
Cited
US1882814A
Cited
DE526998C
Cited
US1938757A
Cited
US1978279A
Cited
US2184011A
Cited
US2210137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |