Appeal No. 96-0011 Page 7
Application No. 07/993,896
tri or tetra carboxylic acid with one or more C - C alkanols.7 18
Ehrlich discloses synthetic oils including aliphatic and
aromatic esters. See column 2, lines 30 -44. Typical synthetic
vehicles disclosed include exemplary base oils such as dibutyl
phthalate. Our analysis of Ehrlich leads us to conclude that
the synthetic lubricating oils disclosed are exemplary and
typical of others that may be used in their place. Accordingly,
Ehrlich’s disclosure invites the use of other synthetic
lubricating oils. While Ehrlich does not disclose the specific
synthetic oils of the claimed subject matter, both McGrath and
Pine teach additional synthetic ester compositions useful as
lubricating oils or lubricants within the scope of the claimed
subject matter.
McGrath discloses synthetic ester lubricants which are
dibasic esters of both aliphatic and aromatic acids. Included
in the synthetic esters are phthalic acid esters of C - C7 18
alkanols encompassed by the claimed subject matter. See column
2, lines 53 through column 3, line 16.
Pine likewise discloses synthetic ester lubricants having
alkyl groups encompassing the limitations of the claimed
subject matter. See column 2, lines 30 - 36 and column 3, line
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007