US3681255A
Expired / Lapsed
US
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Process for the preparation of liquid calibration fluids
Assignee: General Electric Co
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Filing: 1970-09-03
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Granted: 1972-08-01
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Expires: 1990-09-03
Abstract
Abstract AQUEOUS BICARBONATE SOLUTIONS WHEN EQUILIBRATED WITH GIVEN CONCENTRATIONS OF CARBON DIOXIDE-CONTAINING GASES WILL EXHIBIT A PREDETERMINABLE PH BEHAVIOR. BY PRESELECTION OF BICARBONATE CONCENTRATION AND EQUILIBRATION GAS COMPOSITIONS, LIQUID CALIBRATION FLUIDS SUITABLE TO STANDARDIZED INSTRUMENTS, E.G., BLOOD MEASURING DEVICES, MAY BE PREPARED HAVING GIVEN PH CONCENTRATIONS AND PARTIAL PRESSURES OF CARBON DIOXIDE AND OTHER GASES E.G., OXYGEN.
Inventors
- 👤 John F Wilfore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14539; A61B5/1495; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/96; G01N2496/00; G01N2496/70; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/102499; Y10T436/108331
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |