Appeal No. 1996-3808 Page 2
Application No. 08/213,832
This is an appeal under 35 U.S.C. § 134 from the
examiner’s refusal to allow claims 3, 4 and 9 which are all of
the claims remaining in the application.
THE INVENTION
Appellants’ invention is directed to a method for the
copolymerization of ethylene with up to 4% molar units of C to
3
C alkenoic acid or ester thereof. The process provides for a
6
continuously operated tubular reactor at a pressure of 500 to
5,000 Bar, elevated temperature and the presence of free
radical initiators. Two reaction zones are provided. The
first reaction zone has a maximum temperature of 240 C. Theo
second reaction zone has a maximum temperature of 300 C.o
Additional initiator is metered into the beginning of a second
reaction zone after the temperature in the first reaction zone
o o
has dropped by from 5 C to 20 C.
THE CLAIMS
Claims 3 is illustrative of appellants invention and is
reproduced below.
3. A process for the preparation of a copolymer of
ethylene containing up to 4% molar of copolymerized units of a
C -C -alkenoic acid or an ester thereof having up to 14 carbon
3 6
atoms or a mixture of said monomers in a continuously operated
tubular reactor at a pressure of from 500 to 5,000 bar and at
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