Patent US3135838A successfully refreshed from Google Patents.
US3135838A
Expired / Lapsed
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Electrostatic loudspeaker
Assignee: WRIGHT ST GEORGE LAB Inc
•
Filing: 1958-12-10
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Granted: 1964-06-02
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Expires: 1978-12-10
Abstract
No abstract record available.
Inventors
- 👤 William M Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:48
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN AN ELECTROACOUSTICAL TRANSDUCER OF THE ELECTROSTATIC TYPE HAVING RIGID ELECTRODE MEANS PARALLEL TO DIAPHRAGMATIC ELECTRODE MEANS, AN ELECTRODE SCREEN COMPRISING: A PLURALITY OF SIMILARLY SHAPED ELONGATE AND STRIPSHAPED CONDUCTOR ELEMENTS WHICH ARE JOINED PARALLEL TO EACH OTHER IN A REGULAR PATTERN BY SUPPORTING AND CONDUCTIVELY CONNECTING MEANS SUCH THAT THE LONGER TRANSVERSE AXIS OF EACH CONDUCTOR ELEMENT IS INCLINED AT A SMALL ANGLE TO THE DIAPHRAGMATIC ELECTRODE MEANS.
Claim 2
Dependent Claim
69 words
IN AN ELECTROACOUSTICAL TRANSDUCER OF THE ELECTROSTATIC TYPE HAVING RIGID ELECTRODE MEANS PARALLEL TO DIAPHRAGMATIC ELECTRODE MEANS, AN ELECTRODE SCREEN COMPRISING: A PLURALITY OF SIMILARLY SHAPED ELONGATE AND STRIPSHAPED CONDUCTOR ELEMENTS WHICH ARE JOINED PARALLEL TO EACH OTHER IN A REGULAR PATTERN BY SUPPORTING AND CONDUCTIVELY CONNECTING MEANS SUCH THAT THE LONGER TRANSVERSE AXIS OF EACH CONDUCTOR ELEMENT IS INCLINED AT A SMALL ANGLE TO THE DIAPHRAGMATIC ELECTRODE MEANS.
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |