Interference No. 102,922
Interference No. 103,088
representatives of Pfizer. At the meeting, Dumas told Gill of
his experience with clay treated with Hercules cationic
dispersants to obtain improved sizing and proposed that Pfizer
try to make stable slurries in their precipitated process
using Hercules' products. Pfizer and Hercules agreed to
exchange products with Pfizer
giving Hercules PCC, under the tradenames Albacor® 5970 and
Alboglos® SF, for testing and with Hercules sending Pfizer
their cationic dispersant product. Both parties sent memos to
their respective people regarding the substance of this July
23, 1987, meeting. See DX 8, DX 15 and DR 126.
On July 24, 1987, Dumas sent a second work request to the
attention of Rienzo at the Kalamazoo facility seeking to
prepare and evaluate handsheets containing 10-20% calcium
carbonate (PCC given Hercules at the July 23, 1987, meeting)
dispersed with 0.35% Hercon® 48 (DX 9). Dumas himself,
testified that Hercon® 48 was 1:1 ratio of AKD and the
cationic resin used in Hercon® 40. (DR 12-13) Rienzo
acknowledged receipt and forwarded the
request to Kelly who again made the treated fillers and other
18
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