Patent US2785226A successfully refreshed from Google Patents.
US2785226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binaural sound reproduction
Assignee: Individual
•
Filing: 1953-03-16
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Granted: 1957-03-12
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Emory G Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:05
CPC Classifications
H; H04; H04S; H04S1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2393885A
Cited
US2505585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |