US2500903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic wire sound recording and reproducing apparatus
Assignee: WIRECORDER Corp
•
Filing: 1945-08-02
•
Granted: 1950-03-14
•
Expires: 1965-08-02
Abstract
No abstract record available.
Inventors
- 👤 Mortimer A Neff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:31
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1844224A
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US1883560A
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US2051036A
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Cited
US2248790A
Cited
US2349018A
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US2408320A
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US2351005A
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US2412318A
Cited
US2369017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |