Patent US2583941A successfully refreshed from Google Patents.
US2491998A
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US
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Fluid-flow indicator
Assignee: Westinghouse Electric Corp
•
Filing: 1944-02-19
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Granted: 1949-12-20
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Expires: 1964-02-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Mikina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:48
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; G01F1/383
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1296947A
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US1578411A
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US1638101A
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US1855205A
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US2134951A
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US2098574A
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US2151941A
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US2319363A
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US2312485A
Cited
US2365573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |