US2769642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering magnetic chuck
Assignee: NORMA HOFFMANN BEARINGS CORP
•
Filing: 1954-12-31
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Granted: 1956-11-06
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Expires: 1974-12-31
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1543; Y; Y10; Y10T; Y10T279/00; Y10T279/11; Y10T279/23; Y10T279/26; Y10T82/00; Y10T82/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1523770A
Cited
US2479584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |