Appeal 2007-4234
Application 10/929,891
are said to increase the rate of conversion of crystalline wax to
amorphous wax (Specification at 40:12-16).
[16] Optionally adding hydrotrope-demulsifiers and chelating agents to
the chemical dispersant is said to increase the solubility of the wax in
a hydrocarbon (Specification at 42:3-5).
[17] Useful hydrotrope-demulsifiers include sodium xylene sulfonate,
sodium dodecyl sulfonate, sodium cumene sulfonate, ammonium
cumene sulfonate, sodium naphthalene sulfonate and sodium
napthenic acid sulfonate (Specification at 42:7-13).
[18] Useful chelating agents include ethylenediamine tetraacetic acid
(EDTA) and its sodium salt, nitrilotriacetic acid (NTA), and
polymeric chelating agents derived from copolymers of acrylic and
maleic acids (Specification at 42:14 through 32:2).`
[19] Useful diluents for dispersing amorphous waxes are said to include
diesel, light cycle oil, vacuum gas oil, middle distillate, kerosene,
crude oil (heavy or light), crude oil tank bottoms, asphalt crude and
fuel oil (Specification at 21:7-9).
[20] However, the dispersing medium may also include liquid
hydrocarbon products derived from natural gas or its byproducts,
organic solvents, and water (Specification at 15:6-12; 16:1-4).
Other findings of fact are cited as necessary below.
III. Scope of Enablement
Section 112 requires that the specification enable those skilled in the
art to make and use the full scope of the claimed invention without undue
experimentation. "The scope of enablement, in turn, is that which is
disclosed in the specification plus the scope of what would be known to one
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