US3391250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverberation unit
Assignee: Wurlitzer Co
•
Filing: 1964-12-21
•
Granted: 1968-07-02
•
Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Klaiber George Stanley
- 👤 Anthony C Ippolito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00992; G10; G10K; G10K15/00; G10K15/08; G10K15/10
Claims Analysis
Total Claims: 0
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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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |