US2596912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multigap magnetic transducer head
Assignee: DAYSTROM ELECTRIC Corp
•
Filing: 1948-08-13
•
Granted: 1952-05-13
•
Expires: 1968-08-13
Abstract
No abstract record available.
Inventors
- 👤 Nygaard Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:19
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1828190A
Cited
US2003968A
Cited
DE617796C
Cited
FR805434A
Cited
US2144844A
Cited
US2325844A
Cited
US2300320A
Cited
FR881343A
Cited
US2351006A
Cited
US2431540A
Cited
US2479308A
Cited
US2433207A
Cited
US2475421A
Cited
US2488717A
Cited
US2459299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |