US3155774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker arrangement
Assignee: Pye Electronic Products Ltd
•
Filing: 1961-08-03
•
Granted: 1964-11-03
•
Expires: 1981-08-03
Abstract
No abstract record available.
Inventors
- 👤 Howell Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:39
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/24; H04R1/26; H04R3/00; H04R3/12; H04R3/14
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |