US2549771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer head
Assignee: IIT Research Institute
•
Filing: 1946-08-16
•
Granted: 1951-04-24
•
Expires: 1966-08-16
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1827051A
Cited
DE617796C
Cited
US2144844A
Cited
US2089287A
Cited
US2195192A
Cited
US2277305A
Cited
US2351007A
Cited
US2361752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |