US2610808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording apparatus
Assignee: J P SCEBURG Corp
•
Filing: 1946-11-22
•
Granted: 1952-09-16
•
Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Hugh H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:41
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/02; G11B15/16; G11B15/18; G11B15/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US947344A
Cited
US789336A
Cited
US947148A
Cited
US1124879A
Cited
US1343910A
Cited
US1374335A
Cited
US1552552A
Cited
US1560721A
Cited
US1847945A
Cited
US1939181A
Cited
US2124938A
Cited
US2119943A
Cited
US2266755A
Cited
US2304913A
Cited
FR852767A
Cited
US2227303A
Cited
US2207075A
Cited
US2298339A
Cited
US2349018A
Cited
US2359612A
Cited
US2420671A
Cited
US2438222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |