US3193355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for analytical testing of liquids
Assignee: S L F ENGINEERING Co
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Filing: 1961-04-25
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Granted: 1965-07-06
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Expires: 1981-04-25
Abstract
No abstract record available.
Inventors
- 👤 Fuhrmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; Y; Y10; Y10T; Y10T436/00; Y10T436/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD FOR DETERMINING THE AMOUNT OF AN ION PRESENT IN A LIQUID WHICH COMPRISES ADDING IN SAID LIQUID AN INDICATOR SOLUTION WHICH PROVIDES THE LIQUID WITH A UNIQUE DISTINCTIVE FIRST COLOR FOR EACH ION CONCENTRATION WITHIN A LIMITED RANGE OF CONCENTRATION OF SAID ION AND DIFFERENT TERMINAL COLORS TO THE LIQUID AT OPPOSITE ENDS OF THE RANGE, WHICH COLORS PERSIST REGARDLESS OF ION CONCENTRATIONS OUTSIDE THE LIMITED RANGE AT THEIR RESPECTIVE ENDS OF THE RANGE TO BE QUANTATIVELY DETERMINED, DETERMINING THE FIRST COLOR OF SAID LIQUID, CHANGING THE CONCENTRATION OF SAID ION IN SAID LIQUID TO THE EXTENT THAT SAID INDICATOR PROVIDES A SINGLE DISTINCTIVE COLOR TERMINAL TO SAID RANGE, DETERMINING THE MODIFIED SECOND COLOR OF THE LIQUID AND DETERMINING THE DIFFERENCE IN THE FIRST AND SECOND COLORS OF SAID LIQUID DUE TO SAID CHANGE IN ION CONTENT WHEREBY THE COLOR DIFFERENTIAL IS REPRESENTATIVE OF A DISTINCTIVE KNOWN CONCENTRATION OF SAID ION.
Claim 2
Independent Claim
153 words
A METHOD FOR DETERMINING THE AMOUNT OF AN ION PRESENT IN A LIQUID WHICH COMPRISES ADDING IN SAID LIQUID AN INDICATOR SOLUTION WHICH PROVIDES THE LIQUID WITH A UNIQUE DISTINCTIVE FIRST COLOR FOR EACH ION CONCENTRATION WITHIN A LIMITED RANGE OF CONCENTRATION OF SAID ION AND DIFFERENT TERMINAL COLORS TO THE LIQUID AT OPPOSITE ENDS OF THE RANGE, WHICH COLORS PERSIST REGARDLESS OF ION CONCENTRATIONS OUTSIDE THE LIMITED RANGE AT THEIR RESPECTIVE ENDS OF THE RANGE TO BE QUANTATIVELY DETERMINED, DETERMINING THE FIRST COLOR OF SAID LIQUID, CHANGING THE CONCENTRATION OF SAID ION IN SAID LIQUID TO THE EXTENT THAT SAID INDICATOR PROVIDES A SINGLE DISTINCTIVE COLOR TERMINAL TO SAID RANGE, DETERMINING THE MODIFIED SECOND COLOR OF THE LIQUID AND DETERMINING THE DIFFERENCE IN THE FIRST AND SECOND COLORS OF SAID LIQUID DUE TO SAID CHANGE IN ION CONTENT WHEREBY THE COLOR DIFFERENTIAL IS REPRESENTATIVE OF A DISTINCTIVE KNOWN CONCENTRATION OF SAID ION.
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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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |