Patent US2583561A successfully refreshed from Google Patents.
US2583561A
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US
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Electronic air flow indicator
Assignee: Individual
•
Filing: 1946-10-23
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Granted: 1952-01-29
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Expires: 1966-10-23
Abstract
No abstract record available.
Inventors
- 👤 General Joseph
- 👤 Marvin A Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:10
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |