US2475439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproduction accompanied by pictures
Assignee: VITARAMA CORP
•
Filing: 1947-03-31
•
Granted: 1949-07-05
•
Expires: 1967-03-31
Abstract
No abstract record available.
Inventors
- 👤 Waller Fred
- 👤 Dresser Willis Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:52
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1389407A
Cited
US1335651A
Cited
US1523173A
Cited
US1924110A
Cited
US1826786A
Cited
US1777418A
Cited
US2044333A
Cited
US1859665A
Cited
GB354170A
Cited
US1909765A
Cited
US1987544A
Cited
US2038976A
Cited
US2031605A
Cited
US2116314A
Cited
US2221312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |