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US2451734A
Expired / Lapsed
US
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Method of and means for the transmission and reproduction of optical and acoustical effects
Assignee: Individual
•
Filing: 1941-05-26
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Granted: 1948-10-19
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Expires: 1961-05-26
Abstract
No abstract record available.
Inventors
- 👤 Hopkins Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:40
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/06; H04N7/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE17712E
Cited
US1595735A
Cited
GB191405A
Cited
US1512361A
Cited
US1612359A
Cited
US1728978A
Cited
US1776097A
Cited
US1907124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |