Patent US2459542A successfully refreshed from Google Patents.
US2459542A
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Density measuring apparatus
Assignee: Republic Flow Meters Co
•
Filing: 1944-07-29
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Granted: 1949-01-18
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Expires: 1964-07-29
Abstract
No abstract record available.
Inventors
- 👤 Albert J Rosenherger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/10; G01N9/20; G01N9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US181099A
Cited
US380533A
Cited
GB189716192A
Cited
US691437A
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GB190520653A
Cited
US1198869A
Cited
US1272605A
Cited
US1384886A
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US1575643A
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US1604387A
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US1838399A
Cited
US2050629A
Cited
US2145903A
Cited
US2248322A
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US2321175A
Cited
US2299179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |