US3091758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal apparatus indicating flow through a pipe, avoiding false alarms during surges
Assignee: Individual
•
Filing: 1960-03-03
•
Granted: 1963-05-28
•
Expires: 1980-03-03
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:55
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; G01P13/0033; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US384570A
Cited
US1953546A
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US2333210A
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US2347830A
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US2513863A
Cited
US2902088A
Cited
US2886720A
Cited
US2966133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |