US4235108A
Expired / Lapsed
US
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Device for measuring temperature using co-crystallized acetylenic compositions
Assignee: Lifelines Technology Inc
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Filing: 1978-11-13
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Granted: 1980-11-25
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Expires: 1998-11-13
Abstract
Abstract A composition is described comprising at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one -C 3BOND C-C 3BOND C- group and substituents selected from the group consisting of sulfonate, urethane and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing, wherein the composition exhibits a substantially different thermogram than the sum of thermograms of the individual components as obtained by differential scanning calorimetry. A device is also described useful for measuring the time-temperature or radiation-dosage history of an article comprising a substrate having deposited thereon the described composition. A process is also described for producing the composition of this invention.
Inventors
- 👤 Gordhanbhai N. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:41
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; C; C09; C09K; C09K9/00; C09K9/02; G01K3/00; G01K3/02; G01K3/04; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A device for measuring temperature comprising a substrate having deposited thereon at least one thermochromic composition consisting essentially of at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one --C.tbd.C--C.tbd.C-- group and substituents selected from the group consisting of sulfonate, urethane, and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing wherein the composition exhibits a substantially different thermogram than the sum of the thermograms of the individual components as obtained by differential scanning calorimetry, and wherein the composition exhibits a higher or lower rate of color change upon exposure to actinic radiation or thermal annealing than the individual compounds.
Claim 2
Independent Claim
119 words
A device for measuring temperature comprising a substrate having deposited thereon at least one thermochromic composition consisting essentially of at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one --C.tbd.C--C.tbd.C-- group and substituents selected from the group consisting of sulfonate, urethane, and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing wherein the composition exhibits a substantially different thermogram than the sum of the thermograms of the individual components as obtained by differential scanning calorimetry, and wherein the composition exhibits a higher or lower rate of color change upon exposure to actinic radiation or thermal annealing than the individual compounds.
Claim 3
Dependent Claim
35 words
The device of claim 1 further comprising a series of said thermochromic co-crystallized compositions, deposited on a substrate, each of which has a progressively higher thermochromic transition temperature than the prior composition in the series.
Claim 4
Independent Claim
122 words
A device for measuring time-temperature or radiation-dosage history of an article comprising at least one composition consisting essentially of at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one --C.tbd.C--C.tbd.C-- group and substituents selected from the group consisting of sulfonate, urethane, and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing wherein the composition exhibits a substantially different thermogram than the sum of thermograms of the individual components as obtained by differential scanning calorimetry, and wherein the composition exhibits a higher or lower rate of color change upon exposure to actinic radiation or thermal annealing then the individual compounds, deposited on a substrate.
Claim 5
Independent Claim
122 words
A device for measuring time-temperature or radiation-dosage history of an article comprising at least one composition consisting essentially of at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one --C.tbd.C--C.tbd.C-- group and substituents selected from the group consisting of sulfonate, urethane, and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing wherein the composition exhibits a substantially different thermogram than the sum of thermograms of the individual components as obtained by differential scanning calorimetry, and wherein the composition exhibits a higher or lower rate of color change upon exposure to actinic radiation or thermal annealing then the individual compounds, deposited on a substrate.
Claim 6
Dependent Claim
56 words
The device of claim 3 comprising a series of said co-crystallized compositions wherein each composition in the series comprises a different weight ratio of the acetylenic compounds thereby resulting in greater known rate of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing as compared to the prior composition in the series.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |