Patent US2687520A successfully refreshed from Google Patents.
US2687520A
Expired / Lapsed
US
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Radar range measuring system
Assignee: United States Department of the Army
•
Filing: 1950-03-28
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Granted: 1954-08-24
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Expires: 1970-03-28
Abstract
No abstract record available.
Inventors
- 👤 Nelson S Fox
- 👤 William P Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2433681A
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US2456666A
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US2463233A
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US2467361A
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US2418465A
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US2509207A
Cited
GB597094A
Cited
US2459481A
Cited
GB610664A
Cited
US2567197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |