US2872810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venturi flow meter
Assignee: Individual
•
Filing: 1956-02-14
•
Granted: 1959-02-10
•
Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Shaffer Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:29
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1266428A
Cited
US1366522A
Cited
US1559155A
Cited
AT147445B
Cited
US2284013A
Cited
GB552863A
Cited
US2523578A
Cited
US2761704A
Cited
US2752949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |