US2881410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identity-indicating system for radio position locator
Assignee: Hazeltine Research Inc
•
Filing: 1954-07-30
•
Granted: 1959-04-07
•
Expires: 1974-07-30
Abstract
No abstract record available.
Inventors
- 👤 Eleanor B Brunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S13/785
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2140350A
Cited
US2450352A
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US2489202A
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US2545503A
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US2552174A
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US2491029A
Cited
US2678437A
Cited
US2592737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |