US3470741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flow meter apparatus
Assignee: ENOCH J DURBIN
•
Filing: 1968-04-30
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Granted: 1969-10-07
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Expires: 1988-04-30
Abstract
No abstract record available.
Inventors
- 👤 Enoch J Durbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:28
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/64; G01F1/76; G01F1/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2514235A
Cited
US2611268A
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US2627543A
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US2681564A
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US2861452A
Cited
US3188862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |