Patent US2866514A successfully refreshed from Google Patents.
US2866514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrective loud speaker enclosure
Assignee: Individual
•
Filing: 1955-04-27
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Granted: 1958-12-30
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Expires: 1975-04-27
Abstract
No abstract record available.
Inventors
- 👤 Weathers Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:50
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2869; H04R1/2884; H04R1/2888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB434563A
Cited
US2072035A
Cited
US2552309A
Cited
US2602860A
Cited
US2632055A
Cited
US2643728A
Cited
US2805729A
Cited
US2806547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |