Patent US1722155A successfully refreshed from Google Patents.
Patent US2512701A successfully refreshed from Google Patents.
US2512701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop-type record changer with record lowering device
Assignee: Farnsworth Research Corp
•
Filing: 1944-02-28
•
Granted: 1950-06-27
•
Expires: 1964-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jerald D Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:05
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/12; G11B17/16; G11B3/00; G11B3/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1438000A
Cited
US1390404A
Cited
US1449252A
Cited
US1568130A
Cited
US1879291A
Cited
US2090746A
Cited
US2178886A
Cited
US2290518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |