US2615989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder
Assignee: MORRIS WEINTRAUB
•
Filing: 1948-10-02
•
Granted: 1952-10-28
•
Expires: 1968-10-02
Abstract
No abstract record available.
Inventors
- 👤 Theodore D Thad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:14
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/18; G11; G11B; G11B33/00; G11B33/02; G11B33/06
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |