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Patent US3471828A successfully refreshed from Google Patents.
US3471828A
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Sonar transducer cage
Assignee: Raytheon Co
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Filing: 1967-11-01
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Granted: 1969-10-07
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Expires: 1987-11-01
Abstract
No abstract record available.
Inventors
- 👤 Donald A Fredenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:17
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/004; G10K11/006; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405605A
Cited
US2708485A
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US2762032A
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US2930912A
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US3056589A
Cited
US3233213A
Cited
US3328752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |