Patent US2300923A successfully refreshed from Google Patents.
US2300923A
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Phonograph
Assignee: Thomas A Edison Inc
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Filing: 1941-04-19
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Granted: 1942-11-03
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Expires: 1961-04-19
Abstract
No abstract record available.
Inventors
- 👤 Aurelius P Hornor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0064; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S29/00; Y10S29/095; Y10S29/097; Y10S29/104; Y10T; Y10T82/00; Y10T82/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-11-02 | 1946-05-04 | 1946-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-02 | 1950-05-04 | 1950-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-02 | 1954-05-04 | 1954-11-03 | $7700.00 | Window Closed / Lapsed |