Appeal No. 95-4081
Application 08/071,895
Unrefined, refined and rerefined oils, either
natural or synthetic (as well as mixtures of two or more
of any of these) of the type disclosed hereinabove can be
used in the compositions of the present invention.
Unrefined oils are those obtained directly from a natural
or synthetic source without further purification
treatment. For example, a shale oil obtained directly
from retorting operations, a petroleum oil obtained
directly from primary distillation or ester oil obtained
directly from an esterification process and used without
further treatment would be an unrefined oil. Refined
oils are similar to the unrefined oils except they have
been further treated in one or more purification steps to
improve one or more properties. Many such purification
techniques are known to those skilled in the art such as
solvent extraction, secondary distillation, acid or base
extraction, filtration, percolation, etc. Rerefined oils
are obtained by processes similar to those used to obtain
refined oils applied to refined oils which have been
already used in service. Such rerefined oils are also
known as reclaimed or reprocessed oils and often are
additionally processed by techniques directed to removal
of spent additives and oil breakdown products.
The examiner's rejection
5. The examiner rejected all the claims as being
unpatentable under 35 U.S.C. § 103 over Braid, U.S. Patent
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