US3203226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for measuring the freezing points of liquids
Assignee: FISKE ASSOCIATES Inc
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Filing: 1962-05-17
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Granted: 1965-08-31
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Augustus H Fiske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:06
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE COMPRISING THE STEPS OF PLACING A MEASURED SAMPLE OF SAID SUBSTANCE IN LIQUID FORM INTO A CONTAINER, CIRCULATING A COOLING MEDIUM AROUND SAID CONTAINER, SAID COOLING MEDIUM HAVING A TEMPERATURE SEVERAL DEGREES LOWER THAN A NORMAL FREEZING POINT OF SAID SUBSTANCE WHILE SIMULTANEOUSLY GENTLY STIRRING SAID SUBSTANCE TO REDUCE THE TEMPERATURE GRADIENTS THEREIN, SUPERCOOLING THE SAMPLE A PREDETERMINED NUMBER OF DEGREES BELOW ITS NORMAL FREEZING POINT AND ESTABLISHING A METASTABLE LIQUID STATE OF EQUILIBRIUM BY GENTLY STIRRING SAID SUBSTANCE, TERMINATING THE CIRCULATION OF SAID COOLING MEDIUM AROUND SAID CONTAINER, REMOVING THE COOLING MEDIUM FROM AROUND SAID CONTAINER TO FORM AN INSULATING AIR POCKET THEREAROUND, MEANWHILE CONTINUING THE GENTLE
Claim 2
Dependent Claim
117 words
A PROCESS FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE COMPRISING THE STEPS OF PLACING A MEASURED SAMPLE OF SAID SUBSTANCE IN LIQUID FORM INTO A CONTAINER, CIRCULATING A COOLING MEDIUM AROUND SAID CONTAINER, SAID COOLING MEDIUM HAVING A TEMPERATURE SEVERAL DEGREES LOWER THAN A NORMAL FREEZING POINT OF SAID SUBSTANCE WHILE SIMULTANEOUSLY GENTLY STIRRING SAID SUBSTANCE TO REDUCE THE TEMPERATURE GRADIENTS THEREIN, SUPERCOOLING THE SAMPLE A PREDETERMINED NUMBER OF DEGREES BELOW ITS NORMAL FREEZING POINT AND ESTABLISHING A METASTABLE LIQUID STATE OF EQUILIBRIUM BY GENTLY STIRRING SAID SUBSTANCE, TERMINATING THE CIRCULATION OF SAID COOLING MEDIUM AROUND SAID CONTAINER, REMOVING THE COOLING MEDIUM FROM AROUND SAID CONTAINER TO FORM AN INSULATING AIR POCKET THEREAROUND, MEANWHILE CONTINUING THE GENTLE
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |