Appeal No. 2001-2048
Application 09/357,257
resistant polyolefin composition made by the process. Claim 17,
directed toward the composition, is illustrative:
17. A polyolefin composition having high resistance to
degradation, said composition formed by combining components
comprising at least on polyolefin component produced from a
transition metal halide catalyst, bis(2,4-
dicumylphenyl)pentaerythritol diphosphite, triisopropanolamine, a
hydrotalcite component, and at least one phenol component.
THE REFERENCES
Miyata 4,675,356 Jun. 23, 1987
Stevenson et al. (Stevenson) 5,438,086 Aug. 1, 1995
Rotzinger et al. (Rotzinger) 5,955,522 Sep. 21, 1999
(effective filing date Jun. 24, 1996)
G.J. Klender et al. (Klender), “Further Studies on the Effects of
Additives on Phenolic Antioxidant - Induced Color and Its
Prevention in Polyolefins”, ANTEC Conference, Baton Rouge,
Louisiana, 1985, at 225-45.
THE REJECTION
Claims 1-20 stand rejected under 35 U.S.C. § 103 as being
unpatentable over the combined teachings of Stevenson, Rotzinger,
Miyata and Klender.
OPINION
We reverse the aforementioned rejection.
Each of the appellants’ independent claims requires that
five components are used to make a polyolefin composition: 1) a
polyolefin produced using a transition metal halide catalyst,
2
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