Appeal 2007-0510
Application 10/699,507
1 O’Rear also discloses that a convenient way to measure the stability
2 of lube base oils is using the Oxidator Test. There are two forms of the test:
3 Oxidator BN and Oxidator A. O’Rear, para. [0031].
4 The Oxidator A test is a measure of oxidation stability during
5 shipping and storage. O’Rear, para. [0031].
6 Another method for studying the stability of lube base oils during
7 storage is to monitor floc and sediment formation when stored in an oven
8 while exposed to air. O’Rear, para. [0034].
9 According to the method disclosed in O’Rear, 50 grams of lube base
10 oil is placed in a loosely capped 7 ounce bottle and placed in an oven at
11 150°F. The sample is inspected periodically for an increase in color or
12 formation of floc or sediments. The test is run for 90 days. O’Rear, para.
13 [0034].
14 4. Tolvanen
15 The invention disclosed in Tolvanen relates to a method and device
16 for determining the stability or storability of oil. Tolvanen at 1:6-7.
17 The invention is based on the finding that the stability of oils can be
18 determined promptly and reliably by measuring the intensity of light
19 scattering from the oil surface. Tolvanen at 2:1-4.
20 The method may be used to measure the contents of substances
21 insoluble in heavy oil fractions derived from petroleum or in their mixtures.
22 Tolvanen at 3:17-19.
23 Figure 1 illustrates a measuring device 10. The device comprises a
24 light source 11, a sample vessel 12, and an indicator 14. Tolvanen at 2:54-
25 56.
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