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US2709253A
Expired / Lapsed
US
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Radio ranging system
Assignee: HASTINGS INSTR CO Inc
•
Filing: 1952-01-05
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Granted: 1955-05-24
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Expires: 1972-01-05
Abstract
No abstract record available.
Inventors
- 👤 Vernon M Haywood
- 👤 Robert L Cayouette
- 👤 Howard C Turnage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02; G01S13/00; G01S13/74; G01S13/82; G01S13/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2198113A
Cited
US2248727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |