Appeal No. 96-3376
Application 08/164,889
examiner concludes from the collective teachings of the applied
references that
[i]t would have been obvious to one having
ordinary skill in the art, at the time
applicants’ invention was made, to have
substituted the rings of rectangular cross-
section in Carre et al. with rings having a
cross sectional shape of a truncated right
circular cone frustum as disclosed by Forbes
for the purpose of creating a shear field to
enhance the shearing of the material being
processed (answer, page 5).
In the paragraph bridging pages 12 and 13 of the
answer, the examiner further urges that one of ordinary skill in
the art would have recognized that a ring of rectangular cross
section and a ring having a cross section of a truncated right
circular cone frustum are each
well known types of rotor and stator pro-
jections used in the mixing art (as evidenced
by the prior art of record), and that such
projections are generally alternative
mechanical structures used for establishing
turbulence and creating shear fields in the
prior art to Carre et al. and Forbes and as
claimed by applicant [sic].
With this as background, the examiner concludes that the
selection of either the rectangular cross section ring or the
ring having a cross section of a truncated right circular cone
9
Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Next
Last modified: November 3, 2007