US3005873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereophonic background music and public address system
Assignee: Wurlitzer Co
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Filing: 1960-02-01
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Granted: 1961-10-24
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Janowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
H; H04; H04S; H04S1/00; G; G11; G11B; G11B31/00; H04R; H04R27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |