US2528725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound ranging system
Assignee: Individual
•
Filing: 1945-06-02
•
Granted: 1950-11-07
•
Expires: 1965-06-02
Abstract
No abstract record available.
Inventors
- 👤 Rines Robert Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:41
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/62; G01S15/00; G01S15/88; G01S15/89
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB315362A
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US1895442A
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US2031884A
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US1972491A
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US2234806A
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US2164125A
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US2288766A
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US2216949A
Cited
US2230649A
Cited
GB541959A
Cited
FR863792A
Cited
US2373396A
Cited
US2418846A
Cited
US2453502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |