US3091708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit element transducer
Assignee: Harris Transducer Corp
•
Filing: 1960-09-30
•
Granted: 1963-05-28
•
Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:26
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/581; H03H9/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A TRANSDUCER, A THREE-TERMINAL SANDWICH COMPRISING AN INTERMEDIATE CONDUCTIVE LAYER, TWO OUTER CONDUCTIVE LAYERS SPACED BY PIEZOELECTRIC CERAMIC MEANS ON OPPOSITE SIDE OF SAID INTERMEDIATE LAYER, AND A MECHANICALLY RESONANT STRUCTURE COMPRISING A BENDABLE ELEMENT IN THE FORM OF A SUBSTANTIALLY CLOSED RING, TO ONE SIDE OF WHICH ONE SIDE OF SAID SANDWICH IS BONDED.
Claim 2
Dependent Claim
56 words
IN A TRANSDUCER, A THREE-TERMINAL SANDWICH COMPRISING AN INTERMEDIATE CONDUCTIVE LAYER, TWO OUTER CONDUCTIVE LAYERS SPACED BY PIEZOELECTRIC CERAMIC MEANS ON OPPOSITE SIDE OF SAID INTERMEDIATE LAYER, AND A MECHANICALLY RESONANT STRUCTURE COMPRISING A BENDABLE ELEMENT IN THE FORM OF A SUBSTANTIALLY CLOSED RING, TO ONE SIDE OF WHICH ONE SIDE OF SAID SANDWICH IS BONDED.
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |