US3605729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow meter system
Assignee: RESPIRATORY BIOELECTRONICS SYS
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Filing: 1970-04-13
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Granted: 1971-09-20
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Expires: 1990-04-13
Abstract
Abstract A TURBINE FLOW METER SYSTEM IS DISCLOSED WHICH RESPONDS A RESPIRATORY FLOW RATE OF A PATIENT. THE FLOW METER SYSTEM INCLUDES APPARATUS FOR INDICATING THE DIRECTION OF SLOW IN THE FLOW METER TO DISTINGUISH INSPIRATION FROM EXPIRATION. AN ELECTRONIC CORRELATION SCHEME PERFORMS ON LINE ELECTRONIC CORRECTION OF DYNAMIC ERRORS CREATED IN THE TURBINE ASSOCIATED FLOW METER SYSTEM. THE CORRECTION SCHEME MAKES ADJUSTMENT TO THE OUTPUT OF THE FLOW METER SYSTEM SO THAT ACCURATE SIMULATION OF THE DYNAMIC CHARACTERSTIC CORRECTS THE OUTPUT THEREFROM.
Inventors
- 👤 Frederick F Liu
- 👤 Ted W Berwin
- 👤 Marvin Q Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/103; A; A61; A61B; A61B5/00; A61B5/08; A61B5/087; A61B5/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |