US2805729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker enclosure
Assignee: Individual
•
Filing: 1953-09-15
•
Granted: 1957-09-10
•
Expires: 1973-09-15
Abstract
No abstract record available.
Inventors
- 👤 Read Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:48
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2811; H04R1/2815; H04R1/2819; H04R1/2861; H04R1/2865; H04R1/2869; H04R1/2884; H04R1/2888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1865550A
Cited
US1904537A
Cited
US1635837A
Cited
US1967223A
Cited
US2310243A
Cited
GB641718A
Cited
US2544742A
Cited
US2665459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |