Appeal No. 2000-1869
Application No. 08/922,478
We reverse all of the rejections on appeal essentially for
the reasons stated in the Brief, Reply Brief, and as set forth
below.
OPINION
The examiner finds that Harato teaches the process of
calcining transition alumina in an atmosphere of hydrogen
chloride to form alpha alumina at about 1100°C. (Answer, page 3).
The examiner thus finds that Harato differs from the claimed
subject matter “in that the % by volume of the hydrogen chloride
is not stated.” Id.
The examiner finds that “Lindsay teaches the claimed process
of calcining transition alumina or aluminum hydrate, ie.
hydroxide, in an atmosphere of hydrogen chloride at a temperature
of about 1200°C to form alpha alumina” (Answer, page 4). The
examiner thus finds that Lindsay “differs [from the claimed
subject matter] in that the % by volume of the chloride
atmosphere is not stated.” Id.
The examiner finds that “Ayame teaches the claimed process
of making alpha alumina by calcining transition alumina at 1000°C
in an atmosphere of HCl, ie. hydrogen chloride” where the
calcining pressure is 700 torr (id.). The examiner concludes
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