Appeal 2007-0691
Application 10/465,423
1 [American Petroleum Institute] categories CF-4 and CG-4 by ASTM D 5968
2 and 120 ppm for category CH-4 by ASTM D 6594 [¶ 0006].
3 Various components of formulated engine oils cause lead corrosion
4 [¶ 0007].
5 For example, desired additive chemistries that are aggressive towards
6 lead and are otherwise disqualified from use in engine oils include sulfur-
7 containing additives [¶¶ 0008 and 0132].
8 The engine oils useful in the invention include diesel and universal
9 oils [¶ 0011].
10 Universal oils encompass both diesel oils and passenger car oils
11 [¶ 0011].
12 The engine oils are employed in internal combustion engines, for
13 example, in motor vehicles fitted with engines of the Otto, Diesel, two-
14 stroke Wankel or orbital type [¶ 0011].
15 The engine oils comprise (a) a base fluid [¶ 0014], (b) a triazole
16 [¶ 0015] and (3) an additive that is aggressive towards lead [¶ 0017].
17 A suitable triazole is 1-(di-(2-ethylhexyl)aminomethyl)-1,2,4-triazole.
18 Example 1 in the specification is said to show the advantages of the
19 invention [¶¶ 0144 and 0145].
20 For the purpose of deciding the appeal, we will assume that the
21 procedure in Example 1 was actually carried out and that the results reported
22 were actually obtained.
23 A "fully formulated non-corrosive engine oil" is used as the base
24 formulation, to which is added 1.0 weight % glycerol monooleate (GMO) or
5
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