Patent US3549839A successfully refreshed from Google Patents.
US3549839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow monitor
Assignee: BRIMCO Mfg CO
•
Filing: 1969-02-26
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Granted: 1970-12-22
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Expires: 1989-02-26
Abstract
No abstract record available.
Inventors
- 👤 George B Hill
- 👤 Jacob D Noorda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0013; G01P13/002; H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; H01H35/405; H01H36/00; H01H36/02
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |