Appeal 2007-0691
Application 10/465,423
1 and
2 (c) at least one oil additive selected from the group
3 consisting of the [1] sulfur-containing antioxidants, [2] sulfur-containing
4 antiwear additives and [3] sulfur-containing copper passivators,
5 and
6 wherein in the absence of component (b), the engine oil
7 composition exceeds about 100 ppm lead as measured according to test
8 ASTM D 6594.
9
10 Claim 12 is representative of the method claims on appeal.
11 Claim 12 reads [matter in brackets added]:
12 A method of preventing corrosion of lead parts that are in the
13 presence of an engine oil composition comprising
14 (a) a base fluid and
15 (b) at least one oil additive selected from the group consisting
16 of the [1] sulfur-containing antioxidants, [2] sulfur-containing antiwear
17 additives and [3] sulfur-containing copper passivators,
18 which method comprises incorporating into said engine oil
19 composition
20 (c) 1-(di-(2-ethylhexyl)aminomethyl)-1,2,4-triazole,
21 where in the absence of component (b), the engine oil composition
22 exceeds about 100 ppm lead as measured according to test ASTM D 6594.
23
24 Chasan
25 In discussing the prior art, we find it necessary to discuss in detail
26 only Chasan.
7
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