US3721227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer for pulse-echo ultrasonic exploration
Assignee: Individual
•
Filing: 1971-08-24
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Granted: 1973-03-20
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Expires: 1991-08-24
Abstract
Abstract A TRANSDUCER FOR PULSE-ECHO ULTRASONIC EXPLORATION IS PROVIDED WITH A SUBSTANTIALLY CENTRALLY DISPOSED APERTURE THROUGH WHICH A SURGICAL INSTRUMENT IS PASSED. THE TRANSDUCER AIDS IN LOCATING THE SURGICAL INSTRUMENT ACCURATELY WITHIN AN OPAQUE BODY AND MONITORING THE PROGRESS OF THE PARTICULAR PROCEDURE. D R A W I N G
Inventors
- 👤 E Larson
- 👤 Le Roy Kopel
- 👤 Nulty D Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/08; A61B8/0833; A61B8/0841; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |