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US3875788A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of and apparatus for determining the concentration of a solution

Assignee: AE&CI Ltd
•
Filing: 1973-02-13
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Granted: 1975-04-08
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Expires: 1993-02-13
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Abstract

Abstract A method of determining the fudge point of a solution of a compound the solubility of which changes with temperature, which comprises heating to a temperature above the fudge point of the solution a sample cell and an associated reference cell containing a non-crystallizable liquid, such as a silicone oil introducing a sample of the solution into the sample cell, cooling the cells, simultaneously measuring the temperatures of the sample and the liquid while cooling, recording the temperature of the sample at which the temperature curve of the sample diverges from the temperature curve of the liquid, displacing the sample in the sample cell with a fresh sample and reheating the cells. Apparatus for conducting said method is also disclosed.

Inventors

  • 👤 Stephen William Mills

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 08:50
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/04

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 99 words
A method of determining the fudge point of a solution of a compound the solubility of which changes with temperature, which method comprises heating to a temperature above the fudge point of said solution containing said compound a sample cell and an associated reference cell containing a silicone oil, introducing a sample of the solution into the sample cell, cooling the cells, simultaneously measuring the temperatures of the sample and the silicone oil while cooling, and recording the temperature of the sample at which the temperature curve of the sample diverges from the temperature curve of the silicone oil.
Claim 2
Independent Claim 99 words
A method of determining the fudge point of a solution of a compound the solubility of which changes with temperature, which method comprises heating to a temperature above the fudge point of said solution containing said compound a sample cell and an associated reference cell containing a silicone oil, introducing a sample of the solution into the sample cell, cooling the cells, simultaneously measuring the temperatures of the sample and the silicone oil while cooling, and recording the temperature of the sample at which the temperature curve of the sample diverges from the temperature curve of the silicone oil.

References Cited (Backward Citations)

US2800793A Cited
US3022664A Cited
US3436190A Cited
US3417604A Cited
US3554002A Cited
US3505024A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-04-07 1978-10-07 1979-04-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-04-07 1982-10-07 1983-04-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-04-07 1986-10-07 1987-04-08 $7700.00 Window Closed / Lapsed

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