US2853923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined apparatus for the reproduction of sound and simultaneous projection of pictures
Assignee: Individual
•
Filing: 1956-02-17
•
Granted: 1958-09-30
•
Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Daniel Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06; G11; G11B; G11B15/00; G11B15/70
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2008881A
Cited
US2426838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |