US2943487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flow meter using tandem rotors
Assignee: Individual
•
Filing: 1957-11-01
•
Granted: 1960-07-05
•
Expires: 1977-11-01
Abstract
No abstract record available.
Inventors
- 👤 David M Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:15
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80; G01F1/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2534712A
Cited
US2602330A
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US2683224A
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US2714310A
Cited
GB740037A
Cited
GB744852A
Cited
US2800022A
Cited
US2832218A
Cited
US2857761A
Cited
US2877649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |