US2771772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the mass rate of flow
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1953-04-13
•
Granted: 1956-11-27
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 John O Kirwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T74/00; Y10T74/18; Y10T74/18856
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1856138A
Cited
US2159684A
Cited
US2366199A
Cited
US2354923A
Cited
US2339737A
Cited
US2542769A
Cited
US2602330A
Cited
US2474368A
Cited
US2591478A
Cited
US2596220A
Cited
US2611663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |