Morphology control of substituted diacetylenic monomers for shelf life monitoring systems
US7161023B2 · kind B2 · utility
11Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Jul 11, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A system for recovering a diacetylenic monomer shelf life monitoring compound of reduced particle size and narrow size distribution range which comprises quenching a solution of the monomer by mixing the solution in a lower temperature quenching fluid having a base temperature which is at least about 30° C. below the nominal temperature at which the monomer compound recrystallizes from solution, the mixing being effected in such a manner as to limit the resulting quenching mixture temperature to one which is not higher than a maximum of about 15° C. above the quenching fluid base temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.