Patent US3528287A successfully refreshed from Google Patents.
US3528287A
Expired / Lapsed
US
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Electrohydrodynamic induction flowmeter and conductivity measuring device
Assignee: Massachusetts Institute of Technology
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Filing: 1967-12-06
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Granted: 1970-09-15
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 James R Melcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:35
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/08; G01F; G01F1/00; G01F1/56; G01F1/58; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07; G01P21/00; G01P21/02; G01P21/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2184511A
Cited
US2861452A
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US3191436A
Cited
GB964390A
Cited
US3286522A
Cited
US3340400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |