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US2333230A
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US
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Magnetic chuck
Assignee: O S WALKER CO Inc
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Filing: 1940-12-24
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Granted: 1943-11-02
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Expires: 1960-12-24
Abstract
No abstract record available.
Inventors
- 👤 John T Beechlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:07
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1546
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) | 1946-11-01 | 1947-05-03 | 1947-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-01 | 1951-05-03 | 1951-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-01 | 1955-05-03 | 1955-11-02 | $7700.00 | Window Closed / Lapsed |