Patent US2869047A successfully refreshed from Google Patents.
US2869047A
Expired / Lapsed
US
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Permanent magnet holding device and mechanical detaching combination
Assignee: US Philips Corp
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Filing: 1954-04-13
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Granted: 1959-01-13
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Expires: 1974-04-13
Abstract
No abstract record available.
Inventors
- 👤 Smit Jan
- 👤 Rademakers Adriaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1546
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |