Crystallized diacetylenic indicator compounds and methods of preparing the compounds
US8642807B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jun 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/229
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Crystallized diacetylenic compounds having certain crystallographic and other characteristics; diacetylenic compounds and mixtures crystallized from diacetylenic solutions; methods of preparing and identifying solvent systems for dissolving diacetylenic compounds; diacetylenic solutions; methods of recrystallizing diacetylenic compounds; crystals of 2,4-hexadiyn-1,6-bis(alkylurea) compounds; and ambient condition indicators and time-temperature condition indicators comprising crystallized diacetylenic compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.