US3328609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical energizing circuit for a piezoelectric element
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
•
Filing: 1964-10-20
•
Granted: 1967-06-27
•
Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Clicques Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:09
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0215; H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/362; H03B7/00; H03B7/02; H03B7/06; H03K; H03K3/00; H03K3/02; H03K3/335; B06B2201/00; B06B2201/30; B06B2201/50; B06B2201/55; B06B2201/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
APPARATUS FOR PERIODIC GENERATION OF ULTRASONIC ENERGY COMPRISING: (A) A PIEZOELECTRIC ELECTROMECHANICAL TRANSDUCER ELEMENT; (B) A TRANSISTOR SUBJECT TO AVALANCHE BREAKDOWN; (C) A SOURCE OF ELECTRIC POTENTIAL; (D) FIRST CIRCUIT MEANS CONNECTING SAID TRANSISTOR TO SAID SOURCE FOR INDUCING AVALANCHE BREAKDOWN OF SAID TRANSISTOR; AND (E) SECOND CIRCUIT MEANS CONNECTED TO SAID TRANSISTOR AND ADAPTED TO BE CONNECTED TO A PIEZOELECTRIC ELEMENT FOR APPLYING AT LEAST A PORTION OF THE POTENTIAL DROP OCCURRING AT SAID TRANSISTOR DURING SAID BREAKDOWN TO SAID PIEZOELECTRIC ELEMENT.
Claim 2
Dependent Claim
83 words
APPARATUS FOR PERIODIC GENERATION OF ULTRASONIC ENERGY COMPRISING: (A) A PIEZOELECTRIC ELECTROMECHANICAL TRANSDUCER ELEMENT; (B) A TRANSISTOR SUBJECT TO AVALANCHE BREAKDOWN; (C) A SOURCE OF ELECTRIC POTENTIAL; (D) FIRST CIRCUIT MEANS CONNECTING SAID TRANSISTOR TO SAID SOURCE FOR INDUCING AVALANCHE BREAKDOWN OF SAID TRANSISTOR; AND (E) SECOND CIRCUIT MEANS CONNECTED TO SAID TRANSISTOR AND ADAPTED TO BE CONNECTED TO A PIEZOELECTRIC ELEMENT FOR APPLYING AT LEAST A PORTION OF THE POTENTIAL DROP OCCURRING AT SAID TRANSISTOR DURING SAID BREAKDOWN TO SAID PIEZOELECTRIC ELEMENT.
References Cited (Backward Citations)
US3258720A
Cited
US2594841A
Cited
US2562450A
Cited
US2692337A
Cited
US2852676A
Cited
US2825813A
Cited
GB814185A
Cited
US3080489A
Cited
US3200350A
Cited
US3141981A
Cited
US3225313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |