US3240289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound system
Assignee: Sony Corp
•
Filing: 1964-10-21
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Granted: 1966-03-15
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Kishi Kanesuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:57
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2869; H04R1/2884; H04R1/2888; H04R1/2807; H04R1/283; H04R1/2834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN ENCLOSURE FOR A CONE SPEAKER COMPRISING: (A) A RIGID FRONT WALL HAVING AN OPENING FOR RECEIVING THE SPEAKER THEREIN, (B) A RIGID BACK WALL, AND (C) A PLURALITY OF SAID WALLS FORMED ENTIRELY OF A THIN MEMBRANE AND EACH DEFINING A SUB-DIAPHRAGM PANEL AND POSITIONED PARALLEL TO AN AXIS OF THE OPENING IN SAID RIGID FRONT WALL.
Claim 2
Dependent Claim
58 words
AN ENCLOSURE FOR A CONE SPEAKER COMPRISING: (A) A RIGID FRONT WALL HAVING AN OPENING FOR RECEIVING THE SPEAKER THEREIN, (B) A RIGID BACK WALL, AND (C) A PLURALITY OF SAID WALLS FORMED ENTIRELY OF A THIN MEMBRANE AND EACH DEFINING A SUB-DIAPHRAGM PANEL AND POSITIONED PARALLEL TO AN AXIS OF THE OPENING IN SAID RIGID FRONT WALL.
References Cited (Backward Citations)
US1787946A
Cited
US1988250A
Cited
US2059929A
Cited
US2549091A
Cited
US2646853A
Cited
US3082839A
Cited
US3101810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |