Patent US3472425A successfully refreshed from Google Patents.
US3303457A
Expired / Lapsed
US
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Assignee: Studsvik Energiteknik AB
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Filing: 1964-10-21
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Granted: 1967-02-07
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Akesson Jan Assar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
G; G21; G21C; G21C17/00; G21C17/10; G21C17/12; G01; G01B; G01B17/00; G01S; G01S1/00; G01S1/72; G01S15/00; G01S15/88; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S367/00; Y10S367/908
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A DEVICE FOR INDICATING THE POSITION OF AN OBJECT BY ULTRA-SOUND COMPRISING A TUBE HAVING A SLOT IN ITS WALL, A PLATE MOUNTED TO BE MOVED INTO AND OUT OF SAID TUBE THROUGH SAID SLOT TO FORM A SOUND-REFLECTING BOTTOM THEREIN, MEANS ON SAID OBJECT FOR MOVING SAID PLATE INTO SAID TUBE THROUGH SAID SLOT AND AN ULTRASONIC TRANSMITTERRECEIVER SITUATED AT ONE END OF SAID TUBE FOR MEASURING THE DISTANCE THEREFROM TO SAID SOUND-REFLECTING BOTTOM.
References Cited (Backward Citations)
US2233572A
Cited
US2556346A
Cited
US2713263A
Cited
FR1126419A
Cited
US3237150A
Cited
FR1329765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |