Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2008-01-15
2008-01-15
Egwim, Kelechi C. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S056000
Reexamination Certificate
active
07319117
ABSTRACT:
The invention concerns a method for preparing a multiple emulsion comprising an invert emulsion consisting of an internal aqueous phase dispersed in an internal organic phase, dispersed in an external aqueous phase: the internal aqueous phase comprising optionally at least a hydrophilic active substance; the internal organic phase comprising optionally at least a hydrophobic active substance; the invert emulsion comprising at least an internal surfactant and/or at least an internal amphiphilic polymer; the external aqueous phase comprising optionally at least a hydrophilic active substance and at least an external surfactant and/or an external amphiphilic polymer.
REFERENCES:
patent: 5100951 (1992-03-01), Fillipo et al.
patent: 7101931 (2006-09-01), Lannibois-Drean et al.
patent: 7214717 (2007-05-01), Jaques Bibette et al.
Mercier Jean-Michel
Vallier Emmanuelle
Egwim Kelechi C.
Hunton & Williams LLP
Rhodia Chimie
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