Patent US1492023A successfully refreshed from Google Patents.
US1492023A
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US
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Sound record
Assignee: NEW JERSEY PATENT CO
•
Filing: 1922-02-11
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Granted: 1924-04-29
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Expires: 1942-02-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Edison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/68; G11B3/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942
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) | 1927-04-29 | 1927-10-29 | 1928-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-29 | 1931-10-29 | 1932-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-29 | 1935-10-29 | 1936-04-29 | $7700.00 | Window Closed / Lapsed |