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Patent US3427866A successfully refreshed from Google Patents.
US3427866A
Expired / Lapsed
US
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Ultrasonic thickness gauge and flow detector
Assignee: Individual
•
Filing: 1965-10-26
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Granted: 1969-02-18
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Expires: 1985-10-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick Gordon Weighart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/07; G01B; G01B17/00; G01B17/02; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02854
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |