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Patent US2433332A successfully refreshed from Google Patents.
US2433332A
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System for locating obstacles
Assignee: Submarine Signal Co
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Filing: 1941-10-22
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Granted: 1947-12-30
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Expires: 1961-10-22
Abstract
No abstract record available.
Inventors
- 👤 Benioff Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:23
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/521; G01S15/00; G01S15/87; G01S15/876; G01S7/523; G01S7/526; G01S7/529; G01S7/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US299968A
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US448252A
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US1225796A
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GB248189A
Cited
US1784137A
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US1973673A
Cited
US1954955A
Cited
US2098287A
Cited
US2225046A
Cited
GB542634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |