US3082839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-fidelity loudspeaker system
Assignee: Individual
•
Filing: 1959-03-27
•
Granted: 1963-03-26
•
Expires: 1979-03-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Whitcas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:30
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A LOUDSPEAKER CABINET COMPRISING A CURVED SOLID WALL TUBULAR MEMBER HAVING A LENGTH SUBSTANTIALLY GREATER THAN ITS MAXIMUM INNER DIAMETER, A PAIR OF END MEMBERS CLOSING THE OPPOSITE ENDS OF SAID TUBULAR MEMBER, A SPEAKER OPENING DISPOSED IN THE WALL OF SAID TUBULAR MEMBER, SAID SPEAKER OPENING HAVING A LENGTH SUBSTANTIALLY CO-EXTENSIVE WITH THE LENGTH OF SAID TUBULAR MEMBER AND A WIDTH SUBSTANTIALLY LESS THAN SAID MAXIMUM INNER DIAMETER OF SAID TUBULAR MEMBER, AND AN OUTER SOLID WALL TUBE SURROUNDING SAID FIRST-NAMED TUBULAR MEMBER AND SPACED THEREFROM TO FORM AN AIR CHAMBER THEREBETWEEN, SAID OUTER TUBE HAVING AN OPENING THEREIN DIRECTLY OPPOSITE THE SPEAKER OPENING IN SAID FIRST-NAMED TUBULAR MEMBER.
Claim 2
Dependent Claim
110 words
A LOUDSPEAKER CABINET COMPRISING A CURVED SOLID WALL TUBULAR MEMBER HAVING A LENGTH SUBSTANTIALLY GREATER THAN ITS MAXIMUM INNER DIAMETER, A PAIR OF END MEMBERS CLOSING THE OPPOSITE ENDS OF SAID TUBULAR MEMBER, A SPEAKER OPENING DISPOSED IN THE WALL OF SAID TUBULAR MEMBER, SAID SPEAKER OPENING HAVING A LENGTH SUBSTANTIALLY CO-EXTENSIVE WITH THE LENGTH OF SAID TUBULAR MEMBER AND A WIDTH SUBSTANTIALLY LESS THAN SAID MAXIMUM INNER DIAMETER OF SAID TUBULAR MEMBER, AND AN OUTER SOLID WALL TUBE SURROUNDING SAID FIRST-NAMED TUBULAR MEMBER AND SPACED THEREFROM TO FORM AN AIR CHAMBER THEREBETWEEN, SAID OUTER TUBE HAVING AN OPENING THEREIN DIRECTLY OPPOSITE THE SPEAKER OPENING IN SAID FIRST-NAMED TUBULAR MEMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |