Appeal No. 1997-4336
Application No. 08/279,317
particular co-solvent. At least 10 weight percent of the spin
liquid, which makes up 65 to 92 percent by weight of the total
spin solution, is the co-solvent. The co-solvent is selected
such that the co-solvent is a poorer solvent for the
polyolefin than the hydrocarbon spin liquid. According to the
appellants, the provision of a greater portion of co-solvent
in the solution will result in a higher cloud point pressure
for the solution at any given temperature. (Appeal brief,
page 2.)
The examiner relies upon the following prior art
references as evidence of unpatentability:
Sander et al. (Sander) 4,112,029 Sep. 5,
1978
Fenton et al. (Fenton) 4,539,374 Sep. 3,
1985
Claims 20 through 22 and 24 through 28 stand rejected
under 35 U.S.C. § 103 as being unpatentable over Fenton.
(Examiner’s answer, pages 3-4.) Also, claims 20 through 22
and 24 through 28 stand rejected under 35 U.S.C. § 102(b) as
anticipated by or, in the alternative, under 35 U.S.C. § 103
as obvious over Sander. (Id. at pages 6-8.)
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007