Patent US3109111A successfully refreshed from Google Patents.
US3109111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-sonic microphone
Assignee: Euphonics Corp
•
Filing: 1961-10-30
•
Granted: 1963-10-29
•
Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Alpha M Wiggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:58
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN ULTRASONIC MICROPHONE, COMPRISING A PIEZOELECTRIC ELEMENT, ELECTRODES ON OPPOSITE SIDES OF THE ELEMENT, CONTACT PLATES DISPOSED ON OPPOSITE SIDES OF THE ELEMENT WITH PORTIONS OF THE CONTACT PLATES PRECISELY SPACING THE CONTACT PLATES FROM SAID ELEMENT, ONE OF SAID CONTACT PLATES HAVING A BODY PORTION LOCATED OVER A VIBRATABLE PORTION OF SAID ELEMENT TO INCREASE THE AMPLITUDE OF VIBRATION, THE OTHER OF SAID CONTACT PLATES HAVING A CENTRAL OPENING, A REFLECTOR PLATE DISPOSED PARALLEL TO SAID ELEMENT WITH SAID OTHER CONTACT PLATE DISPOSED THEREBETWEEN
Claim 2
Dependent Claim
85 words
AN ULTRASONIC MICROPHONE, COMPRISING A PIEZOELECTRIC ELEMENT, ELECTRODES ON OPPOSITE SIDES OF THE ELEMENT, CONTACT PLATES DISPOSED ON OPPOSITE SIDES OF THE ELEMENT WITH PORTIONS OF THE CONTACT PLATES PRECISELY SPACING THE CONTACT PLATES FROM SAID ELEMENT, ONE OF SAID CONTACT PLATES HAVING A BODY PORTION LOCATED OVER A VIBRATABLE PORTION OF SAID ELEMENT TO INCREASE THE AMPLITUDE OF VIBRATION, THE OTHER OF SAID CONTACT PLATES HAVING A CENTRAL OPENING, A REFLECTOR PLATE DISPOSED PARALLEL TO SAID ELEMENT WITH SAID OTHER CONTACT PLATE DISPOSED THEREBETWEEN
References Cited (Backward Citations)
US2484626A
Cited
US2875354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |