Patent US1566427A successfully refreshed from Google Patents.
Patent US2599697A successfully refreshed from Google Patents.
US2599697A
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Testing for quaternary ammonium compounds
Assignee: Wyandotte Chemicals Corp
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Filing: 1950-10-28
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Granted: 1952-06-10
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Expires: 1970-10-28
Abstract
No abstract record available.
Inventors
- 👤 Dwight B Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:42
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173845; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD FOR DETERMINING WHEN THE CONCENTRATION OF A QUATERNARY AMMONIUM GERMICIDAL COMPOUND IN AN AQUEOUS SOLUTION FALLS BELOW A PRESCRIBED MINIMUM LEVEL, WHICH COMPRISES PREPARING A REAGENT SOLUTION CONSISTING ESSENTIALLY OF BROMPHENOL BLUE, SODIUM ACETATE, GLACIAL ACETIC ACID AND DISTILLED WATER, ADDING THIS REAGENT SOLUTION TO A QUATERNARY AMMONIUM GERMICIDAL SOLUTION IN AN AMOUNT SUCH THAT THE BROMPHENOL BLUE IS PRESENT IN A STOICHIOMETRIC AMOUNT RELATIVE TO THE CALCULATED PRESCRIBED MINIMUM CONCENTRATION OF THE QUATERNARY AMMONIUM COMPOUND, THE RATIO OF SODIUM ACETATE, GLACIAL ACETIC ACID AND WATER BEING REGULATED SO THAT THE RESULTING MIXTURE OF REAGENT SOLUTION AND QUATERNARY AMMONIUM GERMICIDAL SOLUTION HAS A PH OF 3.0$0.25, MIXING THE TWO SOLUTIONS, EXAMINING THE RESULTING SOLUTION THROUGH TRANSMITTED LIGHT IN ORDER TO DETERMINE FROM THE COLOR OF THE FINAL SOLUTION IF THE CONCENTRATION OF THE QUATERNARY AMMONIUM COMPOUND HAS FALLEN BELOW THE PRESCRIBED MINIMUM CONCENTRATION.
Claim 2
Independent Claim
145 words
A METHOD FOR DETERMINING WHEN THE CONCENTRATION OF A QUATERNARY AMMONIUM GERMICIDAL COMPOUND IN AN AQUEOUS SOLUTION FALLS BELOW A PRESCRIBED MINIMUM LEVEL, WHICH COMPRISES PREPARING A REAGENT SOLUTION CONSISTING ESSENTIALLY OF BROMPHENOL BLUE, SODIUM ACETATE, GLACIAL ACETIC ACID AND DISTILLED WATER, ADDING THIS REAGENT SOLUTION TO A QUATERNARY AMMONIUM GERMICIDAL SOLUTION IN AN AMOUNT SUCH THAT THE BROMPHENOL BLUE IS PRESENT IN A STOICHIOMETRIC AMOUNT RELATIVE TO THE CALCULATED PRESCRIBED MINIMUM CONCENTRATION OF THE QUATERNARY AMMONIUM COMPOUND, THE RATIO OF SODIUM ACETATE, GLACIAL ACETIC ACID AND WATER BEING REGULATED SO THAT THE RESULTING MIXTURE OF REAGENT SOLUTION AND QUATERNARY AMMONIUM GERMICIDAL SOLUTION HAS A PH OF 3.0$0.25, MIXING THE TWO SOLUTIONS, EXAMINING THE RESULTING SOLUTION THROUGH TRANSMITTED LIGHT IN ORDER TO DETERMINE FROM THE COLOR OF THE FINAL SOLUTION IF THE CONCENTRATION OF THE QUATERNARY AMMONIUM COMPOUND HAS FALLEN BELOW THE PRESCRIBED MINIMUM CONCENTRATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |