US2611268A
Expired / Lapsed
US
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Velocity metering of gas flow
Assignee: National Research Corp
•
Filing: 1947-06-02
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Granted: 1952-09-23
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Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 Glenn L Mellen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/005; G01P5/006; G01F; G01F1/00; G01F1/56; G01F1/64; G01F1/704; G01F1/708; G01F1/7088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |