US3690833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated fluids analyzer having selectively interrupted flow
Assignee: Damon Corp
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Filing: 1970-05-04
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Granted: 1972-09-12
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Expires: 1990-05-04
Abstract
Abstract AN AUTOMATIC CHEMICAL ANALYZER OF THE CONCENTRATIONS OF DIFFERENT CONSTITUENTS IN MINUTE SAMPLES OF FLUID MOVES A SAMPLE ALONG A PROCESSING PATH WITH DISCONTINUOUS FLOW SUCH THAT THE SAMPLE DWELLS ESSENTIALLY STATIONARY IN THE ANALYZER FOR A PORTION OF THE ANALYSIS TIME. A FLUID DIRECTING MECHANISM DELIVERS THE CENTRAL PORTION OF THE PROCESSED SAMPLE TO A PHOTOMETER OF RMEASUREMENT, AND REMOVES THE REST OF THE PROCESSED SAMPLE, WITH WHATEVER OTHER FLUIDS ARE PRESENT, FROM THE PROCESSING PATH. FRESH WASH LIQUID IS FLUSHED THROUGH THE PHOTOMETER TO CLEANSE IT BETWEEN SAMPLES, WHICH CAN BE HELD STATIONARY DURING MEASUREMENT. D R A W I N G
Inventors
- 👤 Andres Ferrari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:46
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/08; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/115831; Y10T436/117497; Y10T436/118339
Claims Analysis
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |