Patent US2146870A successfully refreshed from Google Patents.
US2647402A
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Flow metering mechanism
Assignee: Negretti and Zambra Ltd
•
Filing: 1947-05-05
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Granted: 1953-08-04
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Expires: 1967-05-05
Abstract
No abstract record available.
Inventors
- 👤 Ibbott Harold William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:12
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7791
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US916831A
Cited
US1057621A
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US1487402A
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US1580679A
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US1770912A
Cited
US2052022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |