US2854526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording
Assignee: RCA Corp
•
Filing: 1955-02-10
•
Granted: 1958-09-30
•
Expires: 1975-02-10
Abstract
No abstract record available.
Inventors
- 👤 Adolph R Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:55
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2000198A
Cited
US2678821A
Cited
US2709204A
Cited
US2707212A
Cited
US2647755A
Cited
US2656419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |