US3423700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric resonator
Assignee: Clevite Corp
•
Filing: 1963-04-30
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Granted: 1969-01-21
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Daniel R Curran
- 👤 William J Gerber
- 👤 Alfred L W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/56; H03H9/562; H03H9/0023; H03H9/0095; H03H9/566
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A PIEZOELECTRIC RESONATOR ELEMENT COMPRISING: A FLAT CIRCULAR RING OF PIEZOELECTRIC CERAMIC MATERIAL HAVING A TRANSVERSE SLOT IN ONE PORTION THEREOF TO BE NON-CONTINUOUS IN CIRCUMFERENCE; A FIRST PAIR OF ELECTRODES POSITIONED ON OPPOSITE FACE SURFACES OF A SECOND PORTION OF SAID RING DIAMETRICALLY OPPOSITE FROM SAID SLOT, SAID FIRST PAIR OF ELECTRODES COMPRISING ALIGNED ARCUATE SEGMENTS OF ELECTRICALLY CONDUCTIVE MATERIAL POSITIONED ADJACENT THE INNER PERIPHERY OF SAID RING; A SECOND PAIR OF ELECTRODES POSITIONED ON OPPOSITE FACE SURFACCES OF SAID SECOND RING PORTION; SAID SECOND PAIR OF ELECTRODES COMPRISING ALIGNED ARCUATE SEGMENTS OF ELECTRICALLY CONDUCTIVE MATERIAL POSITIONED ADJACENT THE OUTER PERIPHERY OF SAID SECOND PORTION IN SPACED RELATIONSHIP WITH SAID PAIR; SAID RING HAV-
References Cited (Backward Citations)
US2224891A
Cited
US2230649A
Cited
US2614143A
Cited
US2820911A
Cited
US2830274A
Cited
US2928069A
Cited
US2814741A
Cited
US2994791A
Cited
US3114849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |