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| Number | Title | Issue Date |
| 6103378 | Capsules having discrete solvent/color former and diluent capsule encapsulated phases A process for producing a microencapsulated system comprising the steps of: (a) emulsifying a solution of color precursor in a solvent as a first internal phase and a diluent as a second internal phase in an external phase to produce discrete droplets of ... | 08/15/2000 |