Patent US2295483A successfully refreshed from Google Patents.
US2295483A
Expired / Lapsed
US
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Loudspeaker
Assignee: JENSEN RADIO MANUFACTURING Co
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Filing: 1934-06-04
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Granted: 1942-09-08
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Expires: 1954-06-04
Abstract
No abstract record available.
Inventors
- 👤 Hugh S Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:54
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R1/00; H04R1/20; H04R1/22; H04R9/02; H04R9/022; H04R9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-09-07 | 1946-03-09 | 1946-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-09-07 | 1950-03-09 | 1950-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-09-07 | 1954-03-09 | 1954-09-08 | $7700.00 | Window Closed / Lapsed |