Patent US2530029A successfully refreshed from Google Patents.
US2530029A
Expired / Lapsed
US
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Equalizer for supporting magnetic recording and erasing heads
Assignee: Int Electronics Co
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Filing: 1947-04-25
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Granted: 1950-11-14
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Expires: 1967-04-25
Abstract
No abstract record available.
Inventors
- 👤 Chester C Pond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004; G11B5/48
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) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |