US2591996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moving-coil phonograph pickup
Assignee: FONOFILM IND
•
Filing: 1950-02-10
•
Granted: 1952-04-08
•
Expires: 1970-02-10
Abstract
No abstract record available.
Inventors
- 👤 Arentzen Holger Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:56
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/16; H04R9/00; H04R9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2351353A
Cited
US1767610A
Cited
GB322813A
Cited
US1817787A
Cited
US2181265A
Cited
US2406887A
Cited
US2411997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |