Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form
Reexamination Certificate
2004-10-20
2010-11-09
Wax, Robert A (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Particulate form
C264S004000
Reexamination Certificate
active
07829119
ABSTRACT:
A method for making hollow nanoparticles, comprises a) providing an amount of a polyelectrolyte having a charge, b) providing an amount of a counterion having a valence of at least 2, c) combining the polyelectrolyte and the counterion in a solution such that the polyelectrolyte self-assembles to form spherical aggregates, and d) adding nanoparticles to the solution such that nanoparticles arrange themselves around the spherical aggregates. The polyelectrolyte may have a positive or negative charge. The charge ratio R of total charge of the counterions to the total charge of the polyelectrolyte is greater than 1.0.
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Murthy Vinit S.
Rana Rohit K.
Wong Michael S.
Carroll Rodney B.
Conley & Rose, P.C.
Sasan Aradhana
Wax Robert A
William Marsh Rice University
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