US2912857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow measuring system
Assignee: Individual
•
Filing: 1954-10-11
•
Granted: 1959-11-17
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Donald F Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:23
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/37; G01F1/372
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE252202C
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US1041432A
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US1649602A
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US1757968A
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GB205669A
Cited
US1568724A
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US1891810A
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GB345870A
Cited
FR883062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |