Interference No. 102,712
requirement is primarily based upon Augustine’s extensive use
of “WG-300" cutting tools during testing and development of
his invention. According to Suzuki, this fact and related
testimony establish that Augustine specifically contemplated a
“best mode” of carrying out his invention at the time he filed
his patent application, and that best mode involved the
application of an alumina coating to a WG-300 cutting tool.
The designation “WG-300" refers to a specific cutting
tool made by Greenleaf Corporation from HA9S material. The
HA9S starting material was available from ARCO, a division of
Atlantic Richfield Company, as an alumina matrix reinforced
with silicon carbide whiskers (AR-5, 169, 184). WG-300 is not
referred to by name in the Augustine application, nor are the
specific details of its manufacture and composition disclosed
(SB 18-19). This is undisputed. However, the Augustine
application at pages 7-12 does disclose preferred materials,
compositions and processing parameters for manufacture of
suitable ceramic substrates and coating layers for cutting
tool applications. Also, the WG-300 embodiment was
commercially available from the Greenleaf Corporation (SR-
183), and readily available to Augustine and his co-workers as
an “off-the-shelf” item (SR-150).
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