Appeal No. 1996-2930
Application 08/301,784
application.
THE INVENTION
Appellants claim a hydrothermal treatment process for
making fine hexagonal flaky alumina particles having a recited
particle size. Claim 1 is illustrative and reads as follows:
1. A process for producing fine hexagonal flaky alumina
particles having a particle size of 1.0 micron or smaller and
a thickness of 0.1 micron or smaller, the process comprising
the steps of introducing water or an aqueous alkali solution
into a hydrothermal treatment system and subjecting aluminum
hydroxide or alumina hydrate having a particle size of 1
micron or smaller to a hydrothermal treatment in the water or
aqueous alkali solution at a temperature of 350EC to 600EC and
2 2
under a pressure of 200 kg/cm to 50 kg/cm .
THE REFERENCE
Yamaguchi et al. (JP ‘465) 39-13465 July 13, 19642
(Japanese patent publication)
THE REJECTIONS
Claims 1 and 7 stand rejected under 35 U.S.C. § 112,
first paragraph, on the ground that the specification fails to
adequately teach how to make and/or use the invention. These
2 Citations herein to this reference are to the English
translation thereof which is of record.
2
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007