US3118022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer
Assignee: AT&T Inc
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Filing: 1962-05-22
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Granted: 1964-01-14
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Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 Gerhard M Sessler
- 👤 James E West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/01; H04R19/016; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H04M; H04M1/00; H04M1/02; H04M1/03; Y; Y10; Y10S; Y10S55/00; Y10S55/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN ELECTROACOUSTIC TRANSDUCER COMPRISING FIRST AND SECOND PLANE CONDUCTIVE ELECTRODE MEMBERS, MEANS FOR SUPPORTIG SAID MEMBERS IN JUXTAPOSITION TO AND INSULATED FROM ONE ANOTHER, A THIN PREPOLARIZED DIAHRAGM, MEANS FOR TAUTLY SUPPORTING SAID DIAPHRAGM BETWEENSAID FIRST AND SAID SECOND ELECTRODE MEMBERS, SAID DIAPHRAGM BEING COMPOSED OF A NUMBER OF LAYERS OF THIN FILM CONDUCTIVE MATERIAL AND A NUMBER OF LAYERS OF THIN FILM CONDUCTIVE MATERIAL INTIMATELY SANDWICHED BETWEEN SAID LAYERS OF ELECTRET MATERIAL, AND MEANS FOR INDIVIDUALLY CONNECTING ELECTRICALLY TO SAID PLANE CONDUCTIVE MEMBERS AND TO SAID DIAPHRAGM.
Claim 2
Dependent Claim
88 words
AN ELECTROACOUSTIC TRANSDUCER COMPRISING FIRST AND SECOND PLANE CONDUCTIVE ELECTRODE MEMBERS, MEANS FOR SUPPORTIG SAID MEMBERS IN JUXTAPOSITION TO AND INSULATED FROM ONE ANOTHER, A THIN PREPOLARIZED DIAHRAGM, MEANS FOR TAUTLY SUPPORTING SAID DIAPHRAGM BETWEENSAID FIRST AND SAID SECOND ELECTRODE MEMBERS, SAID DIAPHRAGM BEING COMPOSED OF A NUMBER OF LAYERS OF THIN FILM CONDUCTIVE MATERIAL AND A NUMBER OF LAYERS OF THIN FILM CONDUCTIVE MATERIAL INTIMATELY SANDWICHED BETWEEN SAID LAYERS OF ELECTRET MATERIAL, AND MEANS FOR INDIVIDUALLY CONNECTING ELECTRICALLY TO SAID PLANE CONDUCTIVE MEMBERS AND TO SAID DIAPHRAGM.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |