US3056854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binaural sound system for television receivers
Assignee: UNITRONICS Corp
•
Filing: 1957-11-27
•
Granted: 1962-10-02
•
Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Henry S Katzenstein
- 👤 Parzen Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:44
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/60; H04N5/607; Y; Y10; Y10S; Y10S84/00; Y10S84/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2146876A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |