Appeal No. 2002-1933
Application 09/331,417
15. A process for preparing oligomer mixture of the formula I
which are derived from cyclopentene, where
n is an integer from 1 to 15,
R1,R2,R3,R4 independently of one another are hydrogen or alkyl,
which comprises reacting, in a homogeneously or heterogeneously
catalyzed metathesis reaction, a hydrocarbon mixture which
contains cyclopentene and acyclic monoolefins, originates from
petroleum refining by cracking and fractional distillation to
produce a C5 fraction and has a cyclopentene content of at least
5% by weight and wherein the acyclic monoolefins have a penetene
isomer content of at least 70% by weight.
THE REFERENCES
Kelly 4,232,180 Nov. 4, 1980
Phillips Petroleum Co. (GB ‘657) 1,163,657 Sep. 10, 1969
(Great Britain patent specification)
THE REJECTIONS
The claims stand rejected under 35 U.S.C. § 103 as follows:
claims 15-19, 22-24 and 26-28 over Kelly in view of the
appellants’ admitted prior art, and claims 15-23 and 25-28 over
GB ‘657 in view of the appellants’ admitted prior art.
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