Patent US1918905A successfully refreshed from Google Patents.
Patent US2622884A successfully refreshed from Google Patents.
US2622884A
Expired / Lapsed
US
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Phonograph
Assignee: RCA Corp
•
Filing: 1942-08-28
•
Granted: 1952-12-23
•
Expires: 1962-08-28
Abstract
No abstract record available.
Inventors
- 👤 Benjamin R Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:26
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/12; G11B17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1302217A
Cited
US1911707A
Cited
US839902A
Cited
DE393364C
Cited
FR32652E
Cited
US1727731A
Cited
US1838101A
Cited
DE533976C
Cited
US1910685A
Cited
GB338508A
Cited
US1958801A
Cited
GB406354A
Cited
DE598584C
Cited
US2188769A
Cited
US2159836A
Cited
GB498442A
Cited
US2270415A
Cited
US2328052A
Cited
US2352331A
Cited
US2307030A
Cited
US2297014A
Cited
US2396094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |