Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Aqueous continuous liquid phase and discontinuous phase...
Reexamination Certificate
2005-12-08
2010-12-07
Choi, Ling-Siu (Department: 1796)
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Aqueous continuous liquid phase and discontinuous phase...
C075S343000, C252S582000, C428S401000, C428S403000
Reexamination Certificate
active
07846976
ABSTRACT:
A process for producing metallic fine particles is provided by, the reduction of the metallic ions performed in two steps using two types of reducing agents which significantly differ in reducing ability thereof, in which a reducing agent in which the reduction ability is strong is used in the first reduction step, and a reducing agent in which the reduction ability is weak is used in the second reduction step, and the nano-sized metallic fine particles are produced. An aqueous metallic salt solution containing a surfactant is used and a two-step reduction is performed in the same vessel, in which as the reducing agent of the first reduction process, at least one selected from the group consisting of boron hydride, dimethylamine borane, hydrazine, and ascorbic acid is used, and as the reducing agent of the second reduction process, specific alkylamine or alkanolamine is used.
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Hirata Hiroki
Mizoguchi Daigou
Murouchi Masato
Satoh Jun-etsu
Takata Yoshiaki
Choi Ling-Siu
Dai Nippon Toryo Co., Ltd.
Leason Ellis LLP.
Mitsubishi Materials Corporation
Wang Chun-Cheng
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