Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2003-08-25
2010-02-23
Le, H. (Holly) T (Department: 1794)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C423S118100, C428S406000, C501S005000, C501S006000, C501S008000
Reexamination Certificate
active
07666505
ABSTRACT:
A synthetic microsphere having a low alkali metal oxide content and methods of forming the microsphere and its components are provided. The synthetic microsphere is substantially chemically inert and thus a suitable replacement for natural cenospheres, particularly in caustic environments such as cementitious mixtures. The synthetic microsphere can be made from an agglomerate precursor that includes an aluminosilicate material, such as fly ash, a blowing agent such as sugar, carbon black, and silicon carbide, and a binding agent. The synthetic microsphere is produced when the precursor is fired at a pre-determined temperature profile so as to form either solid or hollow synthetic microspheres depending on the processing conditions and/or components used.
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pate
Datta Amlan
Hojaji Hamid
McFarlane James A.
Melmeth David L.
Pham Thinh
Gardere Wynne & Sewell LLP
James Hardie Technology Limited
Le H. (Holly) T
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