US2573748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic ranging system, including magnetic recording
Assignee: Individual
•
Filing: 1944-01-25
•
Granted: 1951-11-06
•
Expires: 1964-01-25
Abstract
No abstract record available.
Inventors
- 👤 David H Weinstein
- 👤 Keiser Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/18; G01S5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB472417A
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US2366043A
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US2370385A
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US2380392A
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US2418136A
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US2424633A
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US2426838A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |