US2929049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording error indicator
Assignee: Curtiss Wright Corp
•
Filing: 1954-06-21
•
Granted: 1960-03-15
•
Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Lubkin Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:14
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2609143A
Cited
US2615127A
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US2633564A
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US2675539A
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US2675538A
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US2821696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |