Patent US1895344A successfully refreshed from Google Patents.
Patent US3072212A successfully refreshed from Google Patents.
US3072212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic resonant cabinet
Assignee: Individual
•
Filing: 1961-01-23
•
Granted: 1963-01-08
•
Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Chapman Robert York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:56
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2838; H04R1/2842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
AN ACOUSTIC RESONANT CABINET FOR USE WITH A LOUD ELECTRO-ACOUSTIC SPEAKER, WHICH COMPRISES AN ENCLOSURE OF PARALLELEPIPED SHAPE HAVING A BACK WALL, A FRONT WALL AND A PARTITION WALL WITHIN SAID ENCLOSURE, PARALLEL TO SAID FRONT WALL AND INTERMEDIATE OF THE SPACE BETWEEN SAID FRONT AND BACK WALLS AND SPACED WELL FROM BOTH TO PROVIDE FRONT AND REAR ACOUSTIC CHAMBERS AT BOTH SIDES OF SAID PARTITION WALL, SAID FRONT AND PARTITION WALLS EACH HAVING APPROXIMATELY MIDWAY BETWEEN ITS OPPOSITE MARGINS AN APPROXIMATELY CIRCULAR APERTURE, AND HORIZONTALLY AT EACH SIDE OF SUCH CIRCULAR APERTURE AND SPACED WELL FROM IT AND FROM THE SIDE MARGINS OF SUCH WALLS, A VERTICALLY ELONGATED APERTURE OF APPROXIMATELY THE HEIGHT OF THE CIRCULAR APERTURE, SAID LOUD SPEAKER MOUNTED AND SUPPORTED ON THE REAR FACE OF SAID PARTITION AND IN ALIGNMENT WITH THE CIRCULAR APERTURE IN THAT PARTITION, WITH ITS DISCHARGE FACE TOWARDS SAID CIRCULAR APERTURE, THE DIAMETER OF EACH CIRCULAR APERTURE BEING APPROXIMATELY EQUAL TO THE SOUND EMITTING FACE OF THE LOUD-SPEAKER.
Claim 2
Dependent Claim
166 words
AN ACOUSTIC RESONANT CABINET FOR USE WITH A LOUD ELECTRO-ACOUSTIC SPEAKER, WHICH COMPRISES AN ENCLOSURE OF PARALLELEPIPED SHAPE HAVING A BACK WALL, A FRONT WALL AND A PARTITION WALL WITHIN SAID ENCLOSURE, PARALLEL TO SAID FRONT WALL AND INTERMEDIATE OF THE SPACE BETWEEN SAID FRONT AND BACK WALLS AND SPACED WELL FROM BOTH TO PROVIDE FRONT AND REAR ACOUSTIC CHAMBERS AT BOTH SIDES OF SAID PARTITION WALL, SAID FRONT AND PARTITION WALLS EACH HAVING APPROXIMATELY MIDWAY BETWEEN ITS OPPOSITE MARGINS AN APPROXIMATELY CIRCULAR APERTURE, AND HORIZONTALLY AT EACH SIDE OF SUCH CIRCULAR APERTURE AND SPACED WELL FROM IT AND FROM THE SIDE MARGINS OF SUCH WALLS, A VERTICALLY ELONGATED APERTURE OF APPROXIMATELY THE HEIGHT OF THE CIRCULAR APERTURE, SAID LOUD SPEAKER MOUNTED AND SUPPORTED ON THE REAR FACE OF SAID PARTITION AND IN ALIGNMENT WITH THE CIRCULAR APERTURE IN THAT PARTITION, WITH ITS DISCHARGE FACE TOWARDS SAID CIRCULAR APERTURE, THE DIAMETER OF EACH CIRCULAR APERTURE BEING APPROXIMATELY EQUAL TO THE SOUND EMITTING FACE OF THE LOUD-SPEAKER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |