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Patent US2780938A successfully refreshed from Google Patents.
US2780938A
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Mass flow measuring device
Assignee: RTX Corp
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Filing: 1953-12-09
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Granted: 1957-02-12
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Expires: 1973-12-09
Abstract
No abstract record available.
Inventors
- 👤 Chamberlain John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:17
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475596A
Cited
USRE21127E
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US1110413A
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US1664596A
Cited
US2044806A
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US2402350A
Cited
US2549622A
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US2703013A
Cited
US2675020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |