US3148289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: US Philips Corp
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Filing: 1959-09-24
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Granted: 1964-09-08
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Expires: 1979-09-24
Abstract
No abstract record available.
Inventors
- 👤 Pijls Hermanus Stepha Josephus
- 👤 Enz Ulrich Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:27
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/013; B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0261; B06B2201/00; B06B2201/50; B06B2201/55; B06B2201/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ULTRASONIC TRANSDUCER COMPRISING A VIBRATING BODY, MEANS FOR PRODUCING VIBRATIONS IN SAID VIBRATING BODY, A GENERATOR FOR ENERGIZING SAID VIBRATION PRODUCING MEANS AND FEEDBACK CIRCUIT MEANS FOR CONTROLLING THE FREQUENCY AND AMPLITUDE OF SAID VIBRATIONS, SAID FEEDBACK CIRCUIT MEANS COMPRISING A PLATE OF PIEZOELECTRIC MATERIAL OF SUBSTANTIALLY SMALL DIMENSION RELATIVE TO SAID BODY TO PREVENT ASYMMETRICAL OPERATION THEREOF POSITIONED ON THE SURFACE OF SAID VIBRATING BODY IN A ZONE OF MAXIMUM STRAIN, SAID PLATE BEING CAUSED TO VIBRATE IN A PLANE SUBSTANTIALLY PARALLEL TO SAID SURFACE OF SAID VIBRATING BODY THEREBY PRODUCING A CONTROL VOLTAGE, AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO SAID GENERATOR.
Claim 2
Dependent Claim
106 words
AN ULTRASONIC TRANSDUCER COMPRISING A VIBRATING BODY, MEANS FOR PRODUCING VIBRATIONS IN SAID VIBRATING BODY, A GENERATOR FOR ENERGIZING SAID VIBRATION PRODUCING MEANS AND FEEDBACK CIRCUIT MEANS FOR CONTROLLING THE FREQUENCY AND AMPLITUDE OF SAID VIBRATIONS, SAID FEEDBACK CIRCUIT MEANS COMPRISING A PLATE OF PIEZOELECTRIC MATERIAL OF SUBSTANTIALLY SMALL DIMENSION RELATIVE TO SAID BODY TO PREVENT ASYMMETRICAL OPERATION THEREOF POSITIONED ON THE SURFACE OF SAID VIBRATING BODY IN A ZONE OF MAXIMUM STRAIN, SAID PLATE BEING CAUSED TO VIBRATE IN A PLANE SUBSTANTIALLY PARALLEL TO SAID SURFACE OF SAID VIBRATING BODY THEREBY PRODUCING A CONTROL VOLTAGE, AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO SAID GENERATOR.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |