US3665770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicator
Assignee: Pymah Corp
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Filing: 1970-07-24
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Granted: 1972-05-30
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Expires: 1990-07-24
Abstract
Abstract A thermometer is provided comprising a heat conductive carrier on which there are one or more temperature sensitive regions comprising temperature responsive substances having preselected and relatively precise points at which a temperature induced change in state will begin to occur. In multiple region systems, the regions are spaced apart and the substances are successively graduated with respect to the points. Included is a coloration or other indicator means and a material so positioned with respect to the temperature responsive substance and the indicator means as to be capable of incorporating or otherwise demonstrably responding to the indicator means as a result of the initiation of a temperature responsive change in the temperature responsive substance.
Inventors
- 👤 Zsigmond Sagi
- 👤 Berel Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4863; G; G01; G01K; G01K11/00; G01K11/06; G01K13/00; G01K13/20
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
A thermometer for measuring the temperature of a test subject, said thermometer comprising a heat-conductive carrier comprising at least one thermally responsive means responsive to a predetermined and substantially precise temperature at which a thermally induced change of state begins to occur, indicator means operatively associated with said thermally responsive means and adapted to be wet thereby when said thermally responsive means is in a fluid phase, and means cooperating with said indicator means for indicating the attainment of said substantially precise temperature upon the formation of only sufficient amount of fluid resulting from said change of state to thereby wet the indicator means.
Claim 2
Dependent Claim
104 words
A thermometer for measuring the temperature of a test subject, said thermometer comprising a heat-conductive carrier comprising at least one thermally responsive means responsive to a predetermined and substantially precise temperature at which a thermally induced change of state begins to occur, indicator means operatively associated with said thermally responsive means and adapted to be wet thereby when said thermally responsive means is in a fluid phase, and means cooperating with said indicator means for indicating the attainment of said substantially precise temperature upon the formation of only sufficient amount of fluid resulting from said change of state to thereby wet the indicator means.
Claim 3
Dependent Claim
20 words
The thermometer of claim 1 wherein said heat-conductive carrier comprises spaced cavities containing thermally responsive means responsive to different temperatures.
Claim 4
Dependent Claim
15 words
The thermometer of claim 2 wherein indicia relate to said cavities corresponding to different temperatures.
Claim 5
Dependent Claim
23 words
The thermometer of claim 2 comprising transparent means overlying said indicator means and sealing and isolating each of said cavities from one another.
Claim 6
Dependent Claim
18 words
The thermometer of claim 2 wherein said indicator means comprises a layer of material impregnated with a dye.
Claim 7
Dependent Claim
14 words
The thermometer of claim 1 wherein said thermally responsive means is a solid solution.
Claim 8
Dependent Claim
27 words
The thermometer of claim 1 wherein said indicator means comprises a dye adapted to give color indication of the change of state of said thermally responsive means.
Claim 9
Dependent Claim
39 words
The thermometer of claim 1 comprising a removable barrier means interposed between said thermally responsive means and said indicator means thereby preventing contact between said thermally responsive means and said indicator means until said removable barrier means is removed.
Claim 10
Dependent Claim
88 words
A thermometer for measuring the temperature of a test subject, said thermometer comprising a heat-conductive carrier comprising at least one thermally responsive means responsive to a predetermined and substantially precise temperature at which a thermally induced change of state begins to occur, indicator means operatively associated with and responsive to the change of state of said thermally responsive means, and means cooperating with said indicator means to permit measuring the temperature of said test subject at the onset of the change in state of said thermally responsive means.
Claim 11
Dependent Claim
88 words
A thermometer for measuring the temperature of a test subject, said thermometer comprising a heat-conductive carrier comprising at least one thermally responsive means responsive to a predetermined and substantially precise temperature at which a thermally induced change of state begins to occur, indicator means operatively associated with and responsive to the change of state of said thermally responsive means, and means cooperating with said indicator means to permit measuring the temperature of said test subject at the onset of the change in state of said thermally responsive means.
Claim 12
Dependent Claim
20 words
The thermometer of claim 9 wherein said heat-conductive carrier comprises spaced cavities containing thermally responsive means responsive to different temperatures.
Claim 13
Dependent Claim
15 words
The thermometer of claim 10 wherein indicia relate to said cavities corresponding to different temperatures.
Claim 14
Dependent Claim
23 words
The thermometer of claim 10 comprising transparent means overlying said indicator means and sealing and isolating each of said cavities from one another.
Claim 15
Dependent Claim
18 words
The thermometer of claim 10 wherein said indicator means comprises a layer of material impregnated with a dye.
Claim 16
Dependent Claim
14 words
The thermometer of claim 9 wherein said thermally responsive means is a solid solution.
Claim 17
Dependent Claim
27 words
The thermometer of claim 9 wherein said indicator means comprises a dye adapted to give color indication of the change of state of said thermally responsive means.
Claim 18
Dependent Claim
39 words
The thermometer of claim 9 comprising a removable barrier means interposed between said thermally responsive means and said indicator means thereby preventing contact between said thermally responsive means and said indicator means until said removable barrier means is removed.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |