US2471539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixture for relief grinding of cutting tools
Assignee: Midwest Tool & Manufacturing Co
•
Filing: 1947-07-21
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Granted: 1949-05-31
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Expires: 1967-07-21
Abstract
No abstract record available.
Inventors
- 👤 Emmett E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:47
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/02; B24B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US900664A
Cited
US2099724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |