Appeal No. 96-1952
Application No. 08/163,778
The “one or more” teaching of Farrar relied upon by the
examiner refers to the method of polymerization:
The first material therefore is preferably an
addition polymer, generally made by vinyl or allyl
addition polymerisation of one or more water soluble
ethylenically unsaturated monomers.
(Column 4, ll. 40- 43).
The “ethylenically unsaturated monomers” disclosed by Farrar
in this context are not specified. However, immediately after
this disclosure Farrar does teach that DADMAC alone is
preferably the polymer made by allyl addition (column 4, ll.
44-49). Similarly, Farrar teaches that when DADMAC copolymers
are used as the second material, useful co-monomers are
acrylamide, polyamides, polyamines, and polyethylene imine
(column 5, line 67 - column 6, line 6). The examiner has not
shown that the specific monomers recited in appealed claim 1
as useful in DADMAC copolymers or as the second dispersant
polymer were disclosed or suggested by Farrar. The secondary
references to Takeda, Suzuki and Masano, cited by the examiner
to show the use of benzyl quaternary groups in flocculating
agents similar to those disclosed by Farrar (Answer, page 4),
do not remedy the deficiency of the primary reference to
Farrar. “Where the
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