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Patent US3046019A successfully refreshed from Google Patents.
US3046019A
Expired / Lapsed
US
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Indexing system for magnetic recorders
Assignee: McGraw Edison Co
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Filing: 1959-12-10
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Granted: 1962-07-24
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Expires: 1979-12-10
Abstract
No abstract record available.
Inventors
- 👤 Fred O Holladay
- 👤 Kobler Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/34
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) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |