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US3153156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-proof ceramic transducer
Assignee: Individual
•
Filing: 1962-05-17
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Granted: 1964-10-13
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Frank W Watlington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:10
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PRESSURE-PROOF, PIEZOELECTRIC TRANSDUCER COMPRISING, IN COMBINATION: AT LEAST TWO DISCS OF PIEZOELECTRIC MATERIAL, THE FLAT SURFACES OF SAID DISCS BEARING ELECTRICALLY CONDUCTIVE COATINGS; AND AT LEAST ONE ANNULAR SPACING RING FOR INSERTION BETWEEN SAID PIEZOELECTRIC DISCS SO THAT SAID DISCS AND RING FORM A SANDWICH STRUCTURE, THE THICKNESS OF SAID SPACING RING SMALLER THAN TWICE THE DISTANCE THROUGH WHICH EITHER OF SAID DISCS CAN BE FLEXED WITHOUT EXCEEDING IN ELASTIC LIMIT.
Claim 2
Dependent Claim
72 words
A PRESSURE-PROOF, PIEZOELECTRIC TRANSDUCER COMPRISING, IN COMBINATION: AT LEAST TWO DISCS OF PIEZOELECTRIC MATERIAL, THE FLAT SURFACES OF SAID DISCS BEARING ELECTRICALLY CONDUCTIVE COATINGS; AND AT LEAST ONE ANNULAR SPACING RING FOR INSERTION BETWEEN SAID PIEZOELECTRIC DISCS SO THAT SAID DISCS AND RING FORM A SANDWICH STRUCTURE, THE THICKNESS OF SAID SPACING RING SMALLER THAN TWICE THE DISTANCE THROUGH WHICH EITHER OF SAID DISCS CAN BE FLEXED WITHOUT EXCEEDING IN ELASTIC LIMIT.
References Cited (Backward Citations)
US2836737A
Cited
US3054084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |