US2439092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating pressure at a distance
Assignee: CHARLES H CALLISON
•
Filing: 1946-09-26
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Granted: 1948-04-06
•
Expires: 1966-09-26
Abstract
No abstract record available.
Inventors
- 👤 Floyd T Linstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:42
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L19/00; G01L19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2112371A
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US2071256A
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US2195813A
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US2264487A
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US2275237A
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US2286717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |