Patent US2409430A successfully refreshed from Google Patents.
US2409430A
Expired / Lapsed
US
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Flow indicator for pipe lines
Assignee: Individual
•
Filing: 1944-05-01
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Granted: 1946-10-15
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Carroll V Greenleaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; F; F16; F16B; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10S; Y10S193/00; Y10S193/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-10-14 | 1950-04-15 | 1950-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-14 | 1954-04-15 | 1954-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-14 | 1958-04-15 | 1958-10-15 | $7700.00 | Window Closed / Lapsed |