Interference No. 102,922
Interference No. 103,088
acknowledged
receipt of the request and forwarded it to Kelly, who
pretreated the filler by mixing clay with the Hercon® 40 and
prepared the other chemicals necessary for the paper makers to
make the handsheets. (DR 22, DX 7, pages 2-3). The
papermakers made the handsheets as directed (DX 2) and
returned them to Kelly who examined them and sent them off for
testing. The testing showed improved sizing for the prepared
handsheets containing clay treated with Hercon 40®. (DR 27, DX
7, pages 4-15). Dumas, Rienzo and Alberts all acknowledged
receipt of DX 7.
In April 1987, Hercules and Pfizer, the largest
manufacturer of precipitated calcium carbonate (PCC), executed
a secrecy agreement directed to the use of proprietary
Hercules cationic
dispersants to prepare on site calcium carbonate slurries with
improved sizing efficiency (DR 28, DR 78 and DX 8). On July
23, 1987, Dumas, and corroborators Fredericks and Evans
visited Pfizer, in Easton Pa. meeting with Gill and other
17
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