Patent US2949774A successfully refreshed from Google Patents.
US2949774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flow meter
Assignee: Individual
•
Filing: 1956-03-08
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Granted: 1960-08-23
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Expires: 1976-03-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert F Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:44
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1942193A
Cited
US2323166A
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US2758830A
Cited
US2646547A
Cited
US2714310A
Cited
GB740037A
Cited
GB734992A
Cited
US2775125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |