US2574218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder with automatic time delay between reversals of record transport system
Assignee: Brush Development Co
•
Filing: 1946-01-31
•
Granted: 1951-11-06
•
Expires: 1966-01-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; G11B15/00; G11B15/18; G11B15/44; G11B15/442; G11B15/46; G11B15/48; G11B23/00; G11B23/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |