Patent US2444111A successfully refreshed from Google Patents.
US2444111A
Expired / Lapsed
US
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System for improving operation of electrical hygrometers in radiosondes
Assignee: WASHINGTON INST OF TECHNOLOGY
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Filing: 1945-06-15
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Granted: 1948-06-29
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Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles B Pear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941777A
Cited
US1176794A
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US1383233A
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US1749826A
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US2295570A
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US2375609A
Cited
US2285421A
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GB544226A
Cited
US2418836A
Cited
US2381009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |