US2559505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of making duplicate magnetic phonograph records
Assignee: RCA Corp
•
Filing: 1948-02-03
•
Granted: 1951-07-03
•
Expires: 1968-02-03
Abstract
No abstract record available.
Inventors
- 👤 Hillier James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:52
CPC Classifications
G; G11; G11B; G11B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934000A
Cited
US1152562A
Cited
GB324994A
Cited
US1799322A
Cited
GB371329A
Cited
US1941036A
Cited
US2109627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |