W/O/W composite emulsion

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

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C524S801000, C514S937000, C514S938000, C514S939000, C514S943000

Reexamination Certificate



A W/O/W type composite emulsion, wherein a W/O type emulsion containing water, an oil ingredient and a lipophilic emulsifier each in a proportion expressed in term of mass ratio falling within a range enclosed with bold lines in FIG.1is dispersed in an external aqueous phase with a water-soluble macromolecule blended therein has a sufficient stability, and permits preserving a percent inclusion of medical substances included in an internal aqueous phase of the W/O/W type composite emulsion at a high level.Because of the characteristics, it is now possible to blend in a liquid formulation medical substances having an unfavorable taste or unstable medical substances which have to date hardly been included in liquid formulations with low viscosity, so that the W/O/W type composite emulsion can be utilized for liquid formulations including a liquid formulation for internal application, injections, etc.

patent: 4328149 (1982-05-01), Morse et al.
patent: 4931210 (1990-06-01), Takahashi et al.
patent: 0 174 377 (1986-03-01), None
patent: 58-143831 (1983-08-01), None
patent: 58143831 (1983-08-01), None
patent: 59080326 (1984-05-01), None
patent: 03-127952 (1991-05-01), None
patent: 04-099716 (1992-03-01), None
patent: 04-100536 (1992-04-01), None
patent: 10-158152 (1998-06-01), None
patent: 10-203962 (1998-08-01), None
patent: 11-033391 (1999-02-01), None
patent: 11-188256 (1999-07-01), None
patent: 11-240840 (1999-09-01), None
patent: 11240840 (1999-09-01), None
patent: 2001-151938 (2001-06-01), None
Translation to Kitaoka et al., JP-59-080326 (1984).


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