Patent US3695093A successfully refreshed from Google Patents.
US3695093A
Expired / Lapsed
US
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Device for measuring the solidification temperature of liquids
Assignee: Hoechst AG
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Filing: 1970-11-20
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Granted: 1972-10-03
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Expires: 1990-11-20
Abstract
Abstract To measure the solidification temperature of liquids a device is used comprising a heatable and coolable receptacle for a sample of the liquid, a temperature sensitive element and in the receptacle in the vicinity of the temperature sensitive element means to produce a local supercooling.
Inventors
- 👤 Heinz Hummel
- 👤 Herbert Gortz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
A device for measuring the solidification temperature of a liquid comprising a receptacle for a sample of the liquid, heating and cooling means operatively associated with the receptacle for heating the liquid sample above its solidification temperature and cooling the liquid below the solidification temperature, a temperature sensitive element disposed within the receptacle for determining the temperature of the liquid sample particularly upon its solidification and for providing an indication of said temperature, a concentrated supercooling means disposed in said receptacle in the immediate vicinity of the temperature sensitive element for producing a concentrated local supercooling in the liquid sample in the immediate vicinity of the temperature sensitive element, and said temperature sensitive element providing means for determining when the rate of cooling of the liquid sample in the receptacle diminishes below a predetermined rate whereby the temperature of the liquid sample in the receptacle approaches a substantially constant value corresponding to its solidification temperature and the temperature sensitive element is thereby caused to indicate the solidification temperature of the liquid sample.
Claim 2
Independent Claim
172 words
A device for measuring the solidification temperature of a liquid comprising a receptacle for a sample of the liquid, heating and cooling means operatively associated with the receptacle for heating the liquid sample above its solidification temperature and cooling the liquid below the solidification temperature, a temperature sensitive element disposed within the receptacle for determining the temperature of the liquid sample particularly upon its solidification and for providing an indication of said temperature, a concentrated supercooling means disposed in said receptacle in the immediate vicinity of the temperature sensitive element for producing a concentrated local supercooling in the liquid sample in the immediate vicinity of the temperature sensitive element, and said temperature sensitive element providing means for determining when the rate of cooling of the liquid sample in the receptacle diminishes below a predetermined rate whereby the temperature of the liquid sample in the receptacle approaches a substantially constant value corresponding to its solidification temperature and the temperature sensitive element is thereby caused to indicate the solidification temperature of the liquid sample.
Claim 3
Dependent Claim
32 words
The device of claim 1, wherein the means to produce a local supercooling in the receptacle for the sample are arranged between the bottom of the receptacle and the temperature sensitive element.
Claim 4
Dependent Claim
20 words
The device of claim 1, wherein the means to produce a local supercooling consist of at least one gas outlet.
Claim 5
Dependent Claim
19 words
The device of claim 1, wherein the means to produce a local supercooling consist of a thermoelectric cooling element.
Claim 6
Dependent Claim
39 words
A device as set forth in claim 1 wherein a recording device is connected to the temperature sensitive element for providing a record of the temperature of the liquid sample as it approaches and arrives at its solidification temperature.
Claim 7
Dependent Claim
19 words
A device as set forth in claim 1 wherein said concentrated supercooling means includes means for terminating its operation.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |