US3672843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid analyzing apparatus
Assignee: Honeywell International Inc
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Filing: 1970-04-07
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Granted: 1972-06-27
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Expires: 1990-04-07
Abstract
Abstract FLUID SAMPLE ANALYZING APPARATUS INCLUDES A SAMPLE CHAMBER, A CONSTITUENT SENSOR IN COMMUNICATION WITH THE SAMPLE CHAMBER, A FIRST CONTROL FOR CONTROLLING THE FLOW OF FLUID TO THE SAMPLE CHAMBER AND A SECOND CONTROL FOR CONTROLLING THE REMOVAL OF FLUID FROM THE SAMPLE CHAMBER. A SEQUENCER OPERATES THE FIRST AND SECOND CONTROLS TO SELECTIVELY CHANNEL CLEANING FLUID, CALIBRATING FLUID AND SAMPLE FLUID FOR SENSING BY THE SENSOR TO THE SAMPLE CHAMBER. A GASEOUS CONSTITUENT OF THE SAMPLE IS SENSED BY AN ELECTRODE HAVING A SELECTIVELY PERMEABLE MEMBRANE.
Inventors
- 👤 Thomas A Rosse
- 👤 David E Blackmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
G; G01; G01N; G01N35/00; B; B01; B01L; B01L7/00
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |