US2676022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording
Assignee: ALFRED W NEELY
•
Filing: 1949-03-17
•
Granted: 1954-04-20
•
Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 Roberts Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:32
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/44; G11B15/444; G11B15/446; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5504
Claims Analysis
Total Claims: 0
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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) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |