US2499110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostrictive phonograph pickup unit
Assignee: Individual
•
Filing: 1946-05-15
•
Granted: 1950-02-28
•
Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
H; H04; H04R; H04R15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US351905A
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US499549A
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US1957512A
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US1778048A
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US1959005A
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US2168721A
Cited
US2399585A
Cited
US2326460A
Cited
US2348352A
Cited
US2376456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |