Patent US3029080A successfully refreshed from Google Patents.
US3029080A
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Magnetic recording apparatus
Assignee: IIT Research Institute
•
Filing: 1953-06-29
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Granted: 1962-04-10
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Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Albert P Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE205451C
Cited
US744267A
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US1842550A
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GB351469A
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US1856344A
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CH168192A
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US2223723A
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FR836487A
Cited
US2435260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |