Appeal No. 2005-0898
Application No. 10/047,527
c. 0.5 to 10 weight percent based on the total weight
of resin solids in the coating composition of 2,6-di-tert-butyl-
4-methyl-phenol, the coated substrate being characterized as
having improved filiform corrosion resistance compared to a
similar coated substrate that does not contain (c) in the cured
coating.
The examiner relies upon the following references as
evidence of obviousness:
Geary et al. (Geary) 4,801,680 Jan. 31, 1989
Nakae et al. (Nakae) 5,719,212 Feb. 17, 1998
Chasser et al. (Chasser) 6,069,221 May 30, 2000
Laver 6,103,794 Aug. 15, 2000
Appellants' claimed invention is directed to an aluminum
substrate coated with a composition comprising the recited
components, including 2,6-di-tert-butyl-4-methyl-phenol.
According to appellants, "[t]he coated substrate is explicitly
characterized as having improved filiform corrosion resistance
compared to a similar coated substrate that does not contain 2,6-
di-tert-butyl-4-methyl-phenol in the cured coating" (page 4 of
Brief, second paragraph). We are told that "[f]iliform corrosion
appears as a filamentous, worm-like defect under a coating layer,
adversely affecting appearance, and worse, often leads to coating
delamination (peeling), making it a serious problem" (page 5 of
Brief, first paragraph).
Appealed claims 5-7, 9, 13-15 and 18 stand rejected under
35 U.S.C. § 103(a) as being unpatentable over Geary in view of
-2-
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