US2809520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid velocity measuring apparatus
Assignee: Individual
•
Filing: 1954-03-01
•
Granted: 1957-10-15
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph D Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:52
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1215135A
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FR646261A
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US1953819A
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US1987617A
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US1935445A
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US2111036A
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US2586010A
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US2491390A
Cited
US2495258A
Cited
US2519015A
Cited
US2561763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |