Patent US3026955A successfully refreshed from Google Patents.
US3026955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical loudspeaker enclosure
Assignee: Individual
•
Filing: 1956-08-23
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Granted: 1962-03-27
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Howard L Wilber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:58
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1874279A
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US1887187A
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US2161995A
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US2121008A
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US2138717A
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US2145963A
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US2096192A
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GB653263A
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US2546764A
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US2881850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |