US3681205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and cell for repetitive high precision ph and like measurements
Assignee: Eastman Kodak Co
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Filing: 1970-06-29
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Granted: 1972-08-01
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Expires: 1990-06-29
Abstract
Abstract A REFERENCE SOLUTION OF KNOWN CHARACTERISTICS AND A TEST SOLUTION ARE PASSED THROUGH SEPARATE CAPILLARY TUBES TO THE ARMS OF A Y-SHAPED PASSAGE AND INTO THE STEM OF THE Y WHERE THEY FLOW UNMIXED WITH AN INTERFACE. ELECTRODES IN THE TWO SOLUTIONS ARE COUPLED TO A STANDARD PH METER WHERE THE PH OF THE TEST SOLUTION IS DISPLAYED.
Inventors
- 👤 Alfred N Ducksbury
- 👤 Bruce C Telford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:36
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4166; G01N27/4167
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) | 1975-08-01 | 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 |