US2823974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash-to-sound recording system
Assignee: Individual
•
Filing: 1944-10-03
•
Granted: 1958-02-18
•
Expires: 1964-10-03
Abstract
No abstract record available.
Inventors
- 👤 Fred B Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:02
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/16; G04; G04F; G04F13/00; G04F13/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1677944A
Cited
US2132225A
Cited
US2253975A
Cited
US2298608A
Cited
US2326880A
Cited
US2370133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |