US2507708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phonograph pickup having permanent magnet armature
Assignee: PENNSYLVANIA ELECTRONICS Inc
•
Filing: 1945-12-22
•
Granted: 1950-05-16
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Harry A Greener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
H; H04; H04R; H04R11/00; H04R11/08; H04R11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1834359A
Cited
US1728278A
Cited
GB336648A
Cited
US1916703A
Cited
US1967335A
Cited
FR716223A
Cited
US2073561A
Cited
US2110153A
Cited
US2212530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |