Patent US3154644A successfully refreshed from Google Patents.
US3154644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial acoustic reverberation with feedback and means for preventing sound discontinuittes
Assignee: US Philips Corp
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Filing: 1960-11-16
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Granted: 1964-10-27
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Expires: 1980-11-16
Abstract
No abstract record available.
Inventors
- 👤 Tak Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:41
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A DEVICE FOR PRODUCING ARTIFICIAL ACOUSTIC REVERBERATION COMPRISING: A SOURCE OF SOUND SIGNALS, RECORDING MEANS FOR RECORDING SAID SIGNALS, A PLURALITY OF REPRODUCING MEANS FOR REPRODUCING THE RECORDED SIGNALS, PART OF THE REPRODUCED SIGNALS BEING FED BACK TO SAID RECORDING MEANS THROUGH A PLURALITY OF FEEDBACK AMPLIFIERS, AND
Claim 2
Independent Claim
48 words
A DEVICE FOR PRODUCING ARTIFICIAL ACOUSTIC REVERBERATION COMPRISING: A SOURCE OF SOUND SIGNALS, RECORDING MEANS FOR RECORDING SAID SIGNALS, A PLURALITY OF REPRODUCING MEANS FOR REPRODUCING THE RECORDED SIGNALS, PART OF THE REPRODUCED SIGNALS BEING FED BACK TO SAID RECORDING MEANS THROUGH A PLURALITY OF FEEDBACK AMPLIFIERS, AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |