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US2646559A
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Approach detection by highfrequency radiation
Assignee: Individual
•
Filing: 1950-06-06
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Granted: 1953-07-21
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Expires: 1970-06-06
Abstract
No abstract record available.
Inventors
- 👤 Nutzler Paul Gustav Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1584613A
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DE499203C
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FR707648A
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US2112826A
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US2206923A
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US2188873A
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US2247246A
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US2421771A
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US2386942A
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US2554124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |