Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2005-02-02
2011-12-20
Johnson, Edward (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S625000, C216S088000
Reexamination Certificate
active
08080231
ABSTRACT:
The present invention provides nanoporous α-alumina powders comprising powder comprising interconnected α-alumina primary particles having an average particle size of less than about 100 nm and an interpenetrated array of pores or voids. The invention also provides nanosized α-alumina powders comprising α-alumina particles having an average particle size of less than about 100 nm and slurries, particularly aqueous slurries, which comprise nanosized α-alumina powders of the invention. The invention further provides methods of manufacturing nanoporous α-alumina powders and nanosized α-alumina powders of the invention and methods of polishing using slurries of the invention.
REFERENCES:
patent: 4657754 (1987-04-01), Bauer et al.
patent: 5312791 (1994-05-01), Coblenz et al.
patent: 5389352 (1995-02-01), Wang
patent: 5626715 (1997-05-01), Rostoker
patent: 6194317 (2001-02-01), Kaisaki et al.
patent: 6258137 (2001-07-01), Garg et al.
patent: 6364920 (2002-04-01), Garg et al.
patent: 6391072 (2002-05-01), Garg
patent: 6440187 (2002-08-01), Kasai et al.
patent: 6461584 (2002-10-01), Wen et al.
patent: 2002/0052288 (2002-05-01), Krell et al.
patent: 2002/0111027 (2002-08-01), Sachan et al.
patent: 2003/0098529 (2003-05-01), Drumm et al.
patent: 0 281 265 (1988-02-01), None
patent: 0 585 761 (1993-08-01), None
patent: 554908 (1993-11-01), None
patent: WO-00/69790 (2000-11-01), None
patent: WO-03/044122 (2003-05-01), None
Janbey et al., “A new chemical route for the synthesis of nano-crystalline ?-Al2O3 powder,”Journal of the European Ceramic Societyvol. 21, pp. 2285-2289 (2001).
Rajendran, “Production of ultrafine alpha alumina powders and fabrication of fine grained strong ceramics,”Journal of Materials Sciencevol. 29, pp; 5664-5672 (1994).
Zeng et al., “A New Sol-Gel Route Using Inorganic Salt for Synthesizing Al2O3 Nanopowders,”NanoStructured Materialsvol. 10(4), pp. 543-550 (1998).
Wang et al., “Preparation of Nanoscale ∝-A12O3Powder by th Polyacylamide Gel Method,” NanoStructured Materials 11:1263-1267 (1999).
Abel Law Group, LLP
Johnson Edward
Saint-Gobain Ceramics & Plastics, Inc.
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