Appeal No. 99-1216
S.N. 08/356,194
(a) an oil soluble ethylene copolymer having, in addition
to units derived from ethylene, units of the formula
-CH2-CRR1- I
and units of the formula
-CH2-CRR2- II
the total molar proportion of units of the formulae I and
II in the copolymer being less than 10%, wherein each R
independently represents H or CH3, and each R1 and R2
independently represents a group of the formula COOR3 or
OOCR3, wherein each R3 independently represents alkyl or
alkenyl having 4 to 10 carbon atoms provided that the
units of the formula I are different from the units of the
formula II or
(b)comprising
(i) an oil-soluble ethylene copolymer having, in addition to
units derived from ethylene, less than 10 molar per cent
of units of the formula
-CH2-CRR1- I
and (ii) an oil-soluble ethylene copolymer having, in addition
to units derived from ethylene, less than 10 molar per cent of
units of the formula
-CH2-CRR2- II
wherein R, R1, and R2 have the meaning given above, provided that
R3 in COOR3 represents alkyl or alkenyl having 4 to 10 carbon
atoms, and provided that copolymer (i) differs from copolymer
(ii) by at least 2000 in number average molecular weights.
The references relied upon by the examiner are as follows:
Toyoshima et al.(Toyoshima) 4,404,000 Sep. 13, 1983
Feldman 4,211,534 Jul. 8, 1980
Ilnyckyj et al. (Ilnyckyj)3,961,916 June 8, 1976
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