US2813423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscopic mass flowmeter
Assignee: Detroit Controls Corp
•
Filing: 1954-09-07
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Granted: 1957-11-19
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Expires: 1974-09-07
Abstract
No abstract record available.
Inventors
- 👤 Michael D Altfillisch
- 👤 Howard A Powers
- 👤 Roby B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:02
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80; G01F1/84; G01F1/8409; G01F1/845; G01F1/8454
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2624198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |