Patent US2157554A successfully refreshed from Google Patents.
US2820196A
Expired / Lapsed
US
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Icing detection device
Assignee: Individual
•
Filing: 1951-12-10
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Granted: 1958-01-14
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Expires: 1971-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr John E Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; Y; Y10; Y10S; Y10S261/00; Y10S261/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2266114A
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US2349992A
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US2382365A
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US2355014A
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US2377275A
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US2557311A
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US2457085A
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US2412626A
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US2577779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |