Patent US4380060A successfully refreshed from Google Patents.
Patent US2414560A successfully refreshed from Google Patents.
US2414560A
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US
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Core grinder
Assignee: DJ Murray Manufacturing Co
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Filing: 1945-02-17
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Granted: 1947-01-21
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Expires: 1965-02-17
Abstract
No abstract record available.
Inventors
- 👤 John A Rosmait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:43
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/18; B24; B24B; B24B27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-01-20 | 1950-07-22 | 1951-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-20 | 1954-07-22 | 1955-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-20 | 1958-07-22 | 1959-01-21 | $7700.00 | Window Closed / Lapsed |