US3217539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine flow meter
Assignee: Pneumo Dynamics Corp
•
Filing: 1961-04-07
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Granted: 1965-11-16
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Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 John C Owen
- 👤 Maagd Donald R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/103
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |