US2687882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel magnetic sound recorder and reproducer
Assignee: RCA Corp
•
Filing: 1950-12-19
•
Granted: 1954-08-31
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 James L Pettus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:50
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/34; Y; Y10; Y10S; Y10S242/00; Y10S242/912
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1892554A
Cited
DE624551C
Cited
US1909074A
Cited
DE597945C
Cited
DE650072C
Cited
GB486812A
Cited
US2209582A
Cited
US2108337A
Cited
US2212617A
Cited
GB506654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |