Patent US2515283A successfully refreshed from Google Patents.
US2515283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record changing device for phonographs
Assignee: Individual
•
Filing: 1943-05-10
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Granted: 1950-07-18
•
Expires: 1963-05-10
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Wissner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:41
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/12; G11B17/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1887309A
Cited
FR711219A
Cited
US1918588A
Cited
GB395137A
Cited
US2068449A
Cited
US2043789A
Cited
FR822026A
Cited
GB501165A
Cited
US2159836A
Cited
GB541156A
Cited
US2290518A
Cited
US2318654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |