Measuring system
Abstract
Abstract A DIFFERENTIAL ION SENSITIVE MEASURING SYSTEM IS PROVIDED TO MEASURE THE CONCENTRATION OF PARTICULAR CONSTITUENTS OF A FLUID. A PAIR OF IDENTICAL ION SENSITIVE ELECTRODES OR PROBES ARE USED TO PROVIDE THE DIFFERENTIAL MEASUREMENT. ONE OF THE ELECTRODES IN SURROUNDED WITH A REGENT SELECTED TO REACT WITH THE MOLECULES OF THE FLUID CONSTITUENT UNDER TEST. UPON CONTACT WITH THE FLUID TO BE ANALYZED EACH ELECTRODE RESPONDS IN THE SAME MANNER TO IONS IN THE FLUID SO AS TO YIELD A ZERO VOLTAGE DIFFERENCE FROM THE EFFECTS THEREOF. HOWEVER, AT THE ELECTRODE SURROUNDED WITH THE REAGENT THE LATTER REACTS WITH MOLECULES OF THE CONSTITUENTS UNDER TEST TO PRODUCE AN ION CHANGE THEREAT NOT SEEN BY THE OTHER ELECTRODE. THE MAGNITUDE OF THE ION CHANGE IS INDICATIVE OF THE CONCENTRATION OF THE CONSTITUENT UNDER TEST.
Inventors
- 👤 Donald B Derr
- 👤 Gordon W Neff
- 👤 Carlos J Sambucetti
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |