US3223907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of ultrasonic oscillations
Assignee: US Philips Corp
•
Filing: 1962-10-01
•
Granted: 1965-12-14
•
Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Blok Lourens
- 👤 Pijls Hermanus Stepha Josephus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:28
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0261; H; H03; H03H; H03H9/00; H03H9/22; B06B2201/00; B06B2201/50; B06B2201/58
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
APPARATUS FOR PRODUCING ULTRASONIC VIBRATIONS COMPRISING AN AMPLIFYING DEVICE HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT, A FIRST TRANSDUCER COMPRISING A CORE ELEMENT COMPOSED OF PIEZOMAGNETIC MATERIAL AND SHAPED TO FORM A CLOSED MAGNETIC FLUX PATH, SAID TRASDUCER HAVING A GIVEN NATURAL FREQUENCY OF VIBRATION AND HAVING A WINDING DISPOSED THEREON, MEANS FOR COUPLING SAID OUTPUT CIRCUIT TO SAID WINDING THEREBY TO SUPPLY AN ALTERNATING CURRENT OF SAID GIVEN FREQUENCY TO SAID WINDING, A SECOND TRANDUCER COMPRISING A CORE ELEMENT COMPOSED OF PIEZOMAGNETIC MATERIAL AND SHAPED TO FORM A CLOSED MAGNETIC FLUX PATH AND HAVING A WINDING DISPOSED THEREON WHICH IS MAGNETICALLY ISOLATED FROM SAID FIRST TRANS-
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |