US3845662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for determining the threshold of surface temperatures of heated elements of machines, articles and other equipment
Assignee: Individual
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Filing: 1970-03-24
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Granted: 1974-11-05
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Expires: 1990-03-24
Abstract
Abstract A method for determining the threshold of the surface temperature of heated elements of machines, articles and other equipment, consisting in applying to the surface of the element a coating consisting of a polymer binder and a thermosensitive substance. The thermosensitive substances used are fatty acids and/or salts of these acids, which are capable of melting when heated. When melting occurs, the color of the base which the thermosensitive coating is applied to appears, and this makes it possible to appraise the degree of heating of the surface of the element whose temperature is not lower than the melting point of the thermosensitive substance. The means for carrying out the above method comprises paper colored in dark tones serving as the base onto which the thermosensitive coating is applied.
Inventors
- 👤 V Baikov
- 👤 N Surgina
- 👤 L Gurevich
- 👤 L Yanchenko
- 👤 T Bei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:50
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/06; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A METHOD FOR DETERMINING THE THRESHOLD OF THE SURFACE TEMPERATURE O AN OBJECT WHICH COMPRISES APPLYING TO THE SURFACE OF THE OBJECT A THERMOSENSITIVE COATING COMPOSITION CONSISTING ESSENTIALLY OF A 15-25 PERCENT SUSPENSION OF STEARIC ACID AND IRON STEARATE IN ALCOHOL, TAKEN IN THE PROPORTION OF 1:1, SAID COMPOSITION CAPABLE OF MELTING WHEN HEATED TO 68*-72*C. AS A RESULT OF WHICH THE COLOR OF THE OBJECT UPON WHICH SAID COATING IS APPLIED APPEARS, AND THE APPEARANCE OF
Claim 2
Independent Claim
77 words
A METHOD FOR DETERMINING THE THRESHOLD OF THE SURFACE TEMPERATURE O AN OBJECT WHICH COMPRISES APPLYING TO THE SURFACE OF THE OBJECT A THERMOSENSITIVE COATING COMPOSITION CONSISTING ESSENTIALLY OF A 15-25 PERCENT SUSPENSION OF STEARIC ACID AND IRON STEARATE IN ALCOHOL, TAKEN IN THE PROPORTION OF 1:1, SAID COMPOSITION CAPABLE OF MELTING WHEN HEATED TO 68*-72*C. AS A RESULT OF WHICH THE COLOR OF THE OBJECT UPON WHICH SAID COATING IS APPLIED APPEARS, AND THE APPEARANCE OF
Claim 3
Independent Claim
96 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting of a 15-25 percent suspension of stearic acid and magnesium stearate in alcohol, taken in the proportion of 1:1, said composition capable of melting when heated to 88*-92* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 88*-92* C.
Claim 4
Independent Claim
96 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting of a 15-25 percent suspension of stearic acid and magnesium stearate in alcohol, taken in the proportion of 1:1, said composition capable of melting when heated to 88*-92* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 88*-92* C.
Claim 5
Independent Claim
97 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting essentially of a 15-25 percent suspension of stearic acid and iron stearate in alcohol, taken in the proportion of 1:5, said composition capable of melting when heated to 98*-102* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 98*-102* C.
Claim 6
Independent Claim
97 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting essentially of a 15-25 percent suspension of stearic acid and iron stearate in alcohol, taken in the proportion of 1:5, said composition capable of melting when heated to 98*-102* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 98*-102* C.
Claim 7
Independent Claim
97 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting essentially of a 15-25 percent suspension of stearic acid and zinc stearate in alcohol, taken in the proportion of 1:1, said composition capable of melting when heated to 118*-122* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 118*-122* C.
Claim 8
Independent Claim
97 words
A method for determining the threshold of the surface temperature of an object which comprises applying to the surface of the object a thermosensitive coating composition consisting essentially of a 15-25 percent suspension of stearic acid and zinc stearate in alcohol, taken in the proportion of 1:1, said composition capable of melting when heated to 118*-122* C. as a result of which the color of the object upon which said coating is applied appears, and the appearance of this color is indicative that the surface of said object has attained a temperature not lower than 118*-122* C.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |