US3738812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic chemical analyzer
Assignee: Veolia WTS Systems USA Inc
•
Filing: 1971-07-27
•
Granted: 1973-06-12
•
Expires: 1991-07-27
Abstract
Abstract MEANS ARE PROVIDED TO COMPARE ELECTRICAL SIGNALS CORRESPONDING TO SAMPLE VOLUME, REAGENT CONCENTRATION AND REAGENT VOLUME TO PROVIDE A SIGNAL CORRESPONDING TO SAMPLE CONCENTRATION. APPARATUS FOR MEASURINGG THE CONCENTRATION OF A SAMPLE SOLUTTION INCLUDING MEANS FOR MIXING REAGENT SOLUTION OF KNOWN CONCENTRATION WITH A KNOWN VOLUME OF SAMPLE SOLUTION. MEANS ARE INCLUDED TO PROVIDE AN ELECTRICAL SIGNAL CORRESPONDING TO THE INSTANEOUS CONCENTRATION OF A PARTICULAR ION OF THE SAMPLE-REAGENT MIXTURE. WHEN THE FIRST DERIVATIVE OF THE ELECTRICAL SIGNAL IS A MAXIMUM,
Inventors
- 👤 J Berry
- 👤 W Byrd
- 👤 R Dillon
- 👤 C Dunn
- 👤 S Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:21
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; G01N31/162; G01N31/164; G01N35/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |