Patent US2831348A successfully refreshed from Google Patents.
US2831348A
Expired / Lapsed
US
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Apparatus for suppressing undesirable modes in ultrasonic flowmeters
Assignee: Individual
•
Filing: 1953-08-14
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Granted: 1958-04-22
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Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
- 👤 Kritz Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/667
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2141343A
Cited
US2235131A
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US2516356A
Cited
GB616794A
Cited
US2522551A
Cited
GB623022A
Cited
US2619836A
Cited
US2669121A
Cited
US2681989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |