US4384980A
Expired / Lapsed
US
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Co-crystallized acetylenic compounds
Assignee: Lifelines Technology Inc
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Filing: 1978-11-13
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Granted: 1983-05-24
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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 ungergoing 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 alorimetry. 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
2026-11-08 16:48
CPC Classifications
C; C07; C07C; C07C33/00; C07C33/04; C07C309/00; C07C309/63; C07C309/64; C07C309/65; C07C309/66; C07C309/72; C07C309/73; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01N; G01N33/00; G01N33/02; Y; Y10; Y10S; Y10S436/00; Y10S436/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A process for producing a co-crystallized composition of at least two different acetylenic compounds, 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 said compounds being capable of undergoing a contrasting color change upon exposure to ultraviolet radiation, gamma radiation, or electron beam, or to thermal annealing; which composition exhibits a substantially different thermogram than the sum of the thermograms of the individual components as obtained by differential scanning calorimetry; said process consisting essentially of forming a solution of said different acetylenic compounds and recovering said co-crystallized composition from the solution by rapidly and substantially decreasing the solubility of said composition in the solution to thereby obtain co-crystallization before crystallization of the acetylenic compounds separately, by using a means of the groups consisting of (a) fast removal of solvent and (b) rapid mixing of the solution with about 1 to 10 parts, per part of solvent, of a liquid which is miscible with the solvent but is a non-solvent for the co-crystallized composition.
Claim 2
Dependent Claim
178 words
A process for producing a co-crystallized composition of at least two different acetylenic compounds, 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 said compounds being capable of undergoing a contrasting color change upon exposure to ultraviolet radiation, gamma radiation, or electron beam, or to thermal annealing; which composition exhibits a substantially different thermogram than the sum of the thermograms of the individual components as obtained by differential scanning calorimetry; said process consisting essentially of forming a solution of said different acetylenic compounds and recovering said co-crystallized composition from the solution by rapidly and substantially decreasing the solubility of said composition in the solution to thereby obtain co-crystallization before crystallization of the acetylenic compounds separately, by using a means of the groups consisting of (a) fast removal of solvent and (b) rapid mixing of the solution with about 1 to 10 parts, per part of solvent, of a liquid which is miscible with the solvent but is a non-solvent for the co-crystallized composition.
Claim 3
Dependent Claim
22 words
Process of claim 1 wherein said removal of solvent is accomplished by rapid spray drying while depositing said composition upon a substrate.
Claim 4
Dependent Claim
42 words
Process of claim 1 wherein the solubility of said composition in the solution is decreased by rapidly adding the solution with stirring to said non-solvent liquid, said stirring being adequate to insure complete conversion of the acetylenic compounds to a co-crystallized composition.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |