US2991650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic flow meter
Assignee: Individual
•
Filing: 1956-03-07
•
Granted: 1961-07-11
•
Expires: 1976-03-07
Abstract
No abstract record available.
Inventors
- 👤 Henry S Katzenstein
- 👤 Katzenstein Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:22
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2274262A
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US2280226A
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US2480646A
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US2618968A
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US2669121A
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US2826912A
Cited
US2711646A
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US2708366A
Cited
US2746291A
Cited
US2724269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |