Patent US3137362A successfully refreshed from Google Patents.
US3137362A
Expired / Lapsed
US
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Anechoic sonar calibration pool
Assignee: Nelson Laboratories Inc
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Filing: 1961-03-27
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Granted: 1964-06-16
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Expires: 1981-03-27
Abstract
No abstract record available.
Inventors
- 👤 Charles E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
G; G01; G01V; G01V13/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
AN ANECHOIC SONAR ACLIBRATION POOL COMPRISING IN COMBINATION, A CIRCULAR BOWL, SAID BOWL HAVING A CONCAVE CURVILINEAR SURFACE, A FLAT SHELF ATTACHED TO THE PERIPHERAL EDGE OF SAID BOWL, A RIM MOUNTED ON THE OUTER PERIPHERY OF SAID SHELF, SAID RIM LIKEWISE HAVING A CONCAVE CURVILINEAR SURFACE, AND WATER DISPOSED WITHIN THE LIMITS OF SAID OUTER RIM IN SUFFICIENT QUANTITY TO COMPLETELY FLOOD SAID BOWL AND SAID SHELF.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |