Drying and gas or vapor contact with solids – Process – Freeze-drying
Reexamination Certificate
2007-04-10
2007-04-10
Gravini, S. (Department: 3749)
Drying and gas or vapor contact with solids
Process
Freeze-drying
C423S658000
Reexamination Certificate
active
11209192
ABSTRACT:
The object is to provide a method for drying and storing activated aluminum fine particles which can be a hydrogen source for fuel cells for a long term without being deactivated. A thermal shock treatment as an activation of the aluminum fine particles, which repeats rapid heating and cooling, is performed to aluminum fine particles obtained by milling aluminum alloy; moisture contained in the activated aluminum fine particles is filtrated; said aluminum fine particles are pre-frozen; and the aluminum fine particles are freeze-dried and then stored in nitrogen atmosphere or vacuum-packed.
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U.S. Appl. No. 11/197,782, filed Aug. 4, 2005, M. Watanabe et al.
Jiang Ximeng
Saito Ryuichi
Watanabe Masao
Dynax Corporation
Gravini S.
Howson & Howson LLP
Muroran Institute of Technology
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